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Requirements: 1.6 and up

Overview:  A calculator with 10 computing modes in one application + a handy scientific reference facility

A calculator with 10 computing modes in one application + a handy scientific reference facility - different modes allow: 1) basic arithmetic (both decimals and fractions), 2) scientific calculations, 3) hex, oct & bin format calculations, 4) graphing applications, 5) matrices, 6) complex numbers, 7) quick formulas (including the ability to create custom formulas), 8) quick conversions, 9) solving algebraic equations & 10) time calculations.

Please note that internet permission is needed to allow access to currency exchange rates in the conversion function

Functions include:

* General Arithmetic Functions

* Trigonometric Functions - radians, degrees & gradients - including hyperbolic option

* Power & Root Functions

* Log Functions

* Modulus Function

* Random Number Functions

* Permutations (nPr) & Combinations (nCr)

* Highest Common Factor & Lowest Common Multiple

* Statistics Functions - Statistics Summary (returns the count (n), sum, product, sum of squares, minimum, maximum, median, mean, geometric mean, variance, coefficient of variation & standard deviation of a series of numbers), Bessel Functions, Beta Function, Beta Probability Density, Binomial Distribution, Chi-Squared Distribution, Confidence Interval, Digamma Function, Error Function, Exponential Density, Fisher F Density, Gamma Function, Gamma Probability Density, Hypergeometric Distribution, Normal Distribution, Poisson Distribution, Student T-Density & Weibull Distribution

* Conversion Functions - covers all common units for distance, area, volume, weight, density, speed, pressure, energy, power, frequency, magnetic flux density, dynamic viscosity, temperature, heat transfer coefficient, time, angles, data size, fuel efficiency & exchange rates

* Constants - a wide range of inbuilt constants listed in 4 categories:

1) Physical & Astronomical Constants - press to include into a calculation or long press for more information on the constant and its relationship to other constants

2) Periodic Table - a full listing of the periodic table - press to input an element's atomic mass into a calculation or long press for more information on the chosen element - the app also includes a clickable, pictorial representation of the periodic table

3) Solar System - press to input a planet's orbit distance into a calculation or long press for more information on the chosen planet

4) My Constants - a set of personal constants that can be added via the History

* Convert between hex, oct, bin & dec

* AND, OR, XOR, NOT, NAND, NOR & XNOR Functions

* Left Hand & Right Hand Shift

* Plotter with a table also available together with the graph

* Complex numbers in Cartesian, Polar or Euler Identity format

* The main screen of the calculator can also be set to Fractions Mode for general arithmetic functions including use of parentheses, squares, cubes and their roots

* 20 Memory Registers in each of the calculation modes

* A complete record of each calculation is stored in the calculation history, the result of which can be used in future calculations

An extensive help facility is available which also includes some useful scientific reference sections covering names in the metric system, useful mathematical formulas and a detailed listing of physical laws containing a brief description of each law.

A default screen layout is available for each function showing all buttons on one screen or, alternatively, all the functions are also available on a range of scrollable layouts which are more suitable for small screens - output can be set to scroll either vertically (the default) or horizontally as preferred Ã¢â‚¬â€œ output font size can be increased or decreased by long pressing the + or - buttons

A full range of settings allow easy customisation - move to SD for 2.2+ users

Please email any questions that are not answered in the help section or any requests for bug fixes, changes or extensions regarding the functions of the calculator - glad to help wherever possible.

`https://play.google.com/store/apps/details?id=com.roamingsquirrel.android.calculator_plus'>>https://play.google.com/store/apps/details?id=com.roamingsquirrel.android.calculator_plus`

• ### Similar Content

• By APK
CALCUÃ¢â€žÂ¢ Stylish Calculator PREMIUM v1.2 (Ultimate)
Requirements: 4.0 and up
Overview: Express your style with the calculator made just for you. Choose from 12 colorful, stylish themes to brighten your day while you calculate with ease. CALCUÃ¢â€žÂ¢ is a breeze to use for everyday calculations, with all the scientific capability you need for work and school just a swipe away. And for your most demanding needs, CALCUÃ¢â€žÂ¢ allows you to add or remove the functions and constants you need to make the perfect calculator designed by you, for you.

Description
Express your style with the calculator made just for you. Choose from 12 colorful, stylish themes to brighten your day while you calculate with ease.
CALCUÃ¢â€žÂ¢ is a breeze to use for everyday calculations, with all the scientific capability you need for work and school just a swipe away. And for your most demanding needs, CALCUÃ¢â€žÂ¢ allows you to add or remove the functions and constants you need to make the perfect calculator designed by you, for you.
The Droid Lawyer rates CALCUÃ¢â€žÂ¢ 4.5 out of 5, calling it Ã¢â‚¬Å“a great replacement for AndroidÃ¢â‚¬â„¢s stock calculatorÃ¢â‚¬Â... and we couldnÃ¢â‚¬â„¢t agree more!
Features
Ã¢Ëœâ€¦ Beautiful and intuitive interface with gesture based control and navigation
Ã¢Ëœâ€¦ See instant results of your calculations as you enter them
Ã¢Ëœâ€¦ Swipe down on the display to see calculation history
Ã¢Ëœâ€¦ Swipe up on the scientific keypad to customize it
Ã¢Ëœâ€¦ Create user-defined constants
Ã¢Ëœâ€¦ Choose between simple and full keypad layout
Ã¢Ëœâ€¦ Choose from 12 stylish themes

What's New
NEW! Now displays current trigonometric unit in display (radians/degrees)
improved language support
fix minor issues reported by users

CALCUÃ¢â€žÂ¢ Stylish Calculator PREMIUM v1.2 (Ultimate) - android-zone.ws.apk -  1.8 MB

• By APK
Calculator ++ v2.1.3 (PlusPlus)
Requirements: 2.3 and up
Overview: Calculator++ is an advanced, modern and easy to use scientific calculator #1.
Calculator++ helps you to do basic and advanced calculations on your mobile device.

Description
Are you looking for an efficient and easy-to-use calculator?
Do you want to solve both simple and complex problems?
Try Calculator++, a multipurpose calculator app with slick and intuitive user interface!
Ã¢â‚¬Â¢ Access additional features from the main screen of the app using gestures. For example, to use Ã‚Â«%Ã‚Â» slide button Ã‚Â«/Ã‚Â» up
Ã¢â‚¬Â¢ You don't need to press Ã‚Â«=Ã‚Â» anymore - result is calculated automatically
Ã¢â‚¬Â¢ Copy/paste with a single button press
Ã¢â‚¬Â¢ App supports both portrait and landscape screen orientations
Ã¢Ëœâ€¦ Personalize!
Ã¢â‚¬Â¢ C++ has two layouts: standard and engineer. Choose one which suits you best either from the initial wizard or from the application settings
Ã¢â‚¬Â¢ Set theme you like
Ã¢Ëœâ€¦ Do calculations without switching between the apps!
Calculator++ can work in a separate window floating over other applications on your phone
Ã¢Ëœâ€¦ Calculate percentages, square roots, powers, trigonometric functions!
Calculator has a big variety of built-in functions and supports adding new user-defined functions
Ã¢Ëœâ€¦ Plot 2D and 3D graphs!
Several functions can be plotted simultaneously
Ã¢Ëœâ€¦ Use powerful mathematical capabilities of the app:
Ã¢â‚¬Â¢ Do calculations with variables and constants
Ã¢â‚¬Â¢ Integrate and differentiate
Ã¢â‚¬Â¢ Do calculations with fractions and simplify expressions
Ã¢â‚¬Â¢ Do calculations with complex numbers
The app supports devices with Android version 2.2 and higher and is open source. The app contains adverts which are shown on the secondary screens. To remove them please purchase a special option from the application settings.
Calculator++ on Vkontakte: _http://vk.com/calculatorpp

What's New
Ã¢Ëœâ€¦ Improved button gesture detection
Ã¢Ëœâ€¦ Fast text removal by long pressing "Erase" button
Ã¢Ëœâ€¦ "Equals" button now copies result to the editor
Ã¢Ëœâ€¦ Various bugfixes, stability and usability improvements

Calculator ++ v2.1.3 (PlusPlus) - android-zone.ws.apk -  2.9 MB

• By APK
Graphing Calculator by Mathlab PRO v3.2.87
Requirements: Varies with device
Overview: Graphing calculator with algebra. Essential tool for school and college. Replaces bulky and expensive handheld graphing calculators.

Description
If you're looking for a graphing calculator app that works smoothly and seamlessly, you've found it! Graphing Calculator by Mathlab is a scientific graphing calculator integrated with algebra and is an indispensable mathematical tool for students in elementary school to those in college or graduate school, or just anyone who needs more than what a basic calculator offers. It is designed to replace bulky and costly handheld graphing calculators and works on virtually any Android phone or tablet.
Furthermore, Graphing Calculator by Mathlab displays calculations as it performs them on the high-quality display of the Android device, making it easier for the user to understand the calculations and see them clearly. This app has two great strengths. First, it acts as a fine scientific calculator, but, more than that, it displays the intermediate steps of the calculations as you type. It allows the students to both watch and learn how the calculations are made and how to find the final answer. Second, the graphing ability is absolutely stunning! Not only does the calculator beautifully display the graphs, but it automatically generates the x- and y- values and displays them as well.
Help site with instructions and examples: http://help.mathlab.us
If you have a question, send email to [email protected]
SCIENTIFIC CALCULATOR
* arithmetic expressions +,-,*,/,ÃƒÂ·
* square root, cube and higher roots (hold root key)
* exponent, logarithms (ln, log)
* trigonometric functions sin p/2, cos 30Ã‚Â°, ...
* hyperbolic functions sinh, cosh, tanh, ... (hold "e" key to switch)
* inverse functions (hold direct function key)
* complex numbers, all functions support complex arguments
* derivatives sin x' = cos x, ... (hold x^n key)
* scientific notation (enable in menu)
* percent mode
GRAPHING CALCULATOR
* multiple functions graphing
* implicit functions up to 2nd degree (ellipse 2x^2+3y^2=1, etc.)
* polar graphs (r=cos2?)
* parametric functions, enter each on new line (x=cos t, y=sin t)
* function roots and critical points on a graph, tap legend to turn on and off (top left corner), use menu to display as a list
* graph intersections (x^2=x+1)
* tracing function values and slopes
* scrollable and resizable graphs
* pinch to zoom
* fullscreen graphs in landscape orientation
* function tables
* save graphs as images
* save tables as csv
FRACTION CALCULATOR
* simple and complex fractions 1/2 + 1/3 = 5/6
* mixed numbers, use space to enter values 3 1/2
ALGEBRA CALCULATOR
* linear equations x+1=2 -> x=1
* quadratic equations x^2-1=0 -> x=-1,1
* approximate roots of higher polynomials
* systems of linear equations, write one equation per line, x1+x2=1, x1-x2=2
* polynomial long division
* polynomial expansion, factoring
MATRIX CALCULATOR
* matrix and vector operations
* dot product (hold *), cross product
* determinant, inverse, norm, transpose, trace
LIBRARY
* user defined constants and functions (PRO)

What's New
Independent X&Y zoom, enable in graph settings.
Set function domain in graph menu.
2D scatter plots, enter coordinates in square brackets [0 1 2 3], select checkbox to show linear regression.
New functions min(), max(), gcd(), lcm(), mod(), round(), ceil(), floor(), trunc(), enter from latin keyboard.

Release Info:
Pro features unlocked

Graphing Calculator by Mathlab PRO v3.2.87 - android-zone.ws.apk -  3.8 MB

• By caffeine
Calculator Plus v1.0
Requirements: 4.0 and up

Features:
* Stunning "High Resolution" graphics.
* And Much More

3835dbd80a

• By caffeine
Calculator - Simple & Stylish PRO v1.4.9
Requirements: 2.3+
Overview: Is a simple calculator. It has support for big numbers(up to 12 digits). Calculator can add, subtract, multiply, divide, calculate percentage. Calculator supports the following calculation formula.

Description
Is a simple calculator.
It has support for big numbers(up to 12 digits).
Calculator can add, subtract, multiply, divide, calculate percentage.
Calculator supports the following calculation formula.
500Ãƒâ€”5%25
500ÃƒÂ·5%10000
500-5%475
500+5%525
It saves the value that you enter in the last.
It saves the clipboard.
Ã¢â‚¬Â» Calculator is free, but you can hide the ad by buying a plug-in extension.
[Features]
-Supports Home screen widget
-Copy to clipboard.
-Up to 12 digits.
-Horizontal screen support.
-The DEL key deletes the last digit entered.
-The DEL key long.
-Supports TABLET.
-Calculation memory support.
- History Display.
- History Save.
-Can change the theme.
-Can change the font.
-Can change the display format.
-Supports different Themes(Ninja BLACK/Samurai WHITE/Sakura RED/Yuzu YELLOW/Ajisai BLUE/Matcha GREEN)
-Supports different Fonts(ROBOTO/SERIF/SERIF BOLD/SERIF ITALIC/SANS SERIF/SANS SERIF BOLD/SANS SERIF ITALIC)

WHAT'S NEW

Ver1.4.9
- German modification
- Turkish modification
- Portuguese modification
- Constant bug fixes
- Widget bug fixes
- Support for constant calculation
- To comply with the latest Android layout
- Supports crash that occur in Android5.0
- Bug fixes memory function
- History display
- History save
- CE bug fixes

Calculator - Simple & Stylish PRO v1.4.9.apk -  2.7 MB

• By caffeine
Requirements: 2.3 and up
Overview: Multi Calculator is the best calculator app containing several useful calculators and converters.
Try this powerful calculation capabilities and intuitive & stylish designed app. Multi Calculator supports all kinds of devices.

Description
Multi Calculator is the best calculator app containing several useful calculators and converters.
Try this powerful calculation capabilities and intuitive & stylish designed app.
Multi Calculator supports all kinds of devices.
Ã¢Ë†Å¡ Standard calculator
- Keeps the function of a pocket calculator and adds some math operators.
- Remembers the last calculation condition and check the calculation history records any time you want.
- Up to 15 digits can be entered, and all numbers can be operated.
- Use the calculator on android wear (G Watch, Gear Live, Moto 360, ...)
Ã¢Ë†Å¡ Currency Converter
- Provides real-time currency exchange rates
- Once the currency exchange rates are updated, you can use the currency converter in the offline. Before you go abroad, update once.
- More intuitive to see the currency rates with a currency abbr., name and nation flag images.
Ã¢Ë†Å¡ Interest Calculator
- Provides various options for calculating interest: Installment savings, Regular savings, Simple Interest, Compound Interest, etc.
- Enhanced compound interest calculations. Monthly, Quarterly, Half-Yearly and Yearly are available.
- If you wonder how to gather 100 million dollar in 5 years, try the future value function.
Ã¢Ë†Å¡ Anniversary Calculator
- Keeps track of your anniversaries - with a photo!
- Provides various date calculations
- View as D-Day or Day count
Ã¢Ë†Å¡ Discount Calculator
- Calculate Discount price / Discount %
Ã¢Ë†Å¡ Loan Calculator
- Supports Level payment / Fixed principal payment / Balloon payment
- Set interest only period
- Calculate any type of loan such as Mortgage, Auto loan.
Ã¢Ë†Å¡ Unit Converter
- Supports Length, Area, Weight, Volume, Temperature, Time, Speed, Pressure, Force, Work, Angle, Data and Fuel
Ã¢Ë†Å¡ Health Calculator
- Use Health Calculator for your healthy body
- Calculate BMI(Body Mass Index), BFP(Body Fat Percentage) and Ideal Weight in one screen
- Easy to switch between metric and imperial systems
Ã¢Ë†Å¡ Tip Calculator
- Calculate tip and split the bill
- Separate your bill from Sales Tax and calculate tip
Ã¢Ë†Å¡ VAT Calculator
- Calculate VAT easy and fast
- [email protected]

What's New
v 1.3.8
- Added Currency Converter for smart watch
- New options are added in settings
v 1.3.4
- Power in Unit Converter
v 1.3.3
v 1.3.2
- Moto 360 layout bug fixes

Release Info:

Multi Calculator Premium v1.3.8.apk -  5.2 MB

• By caffeine
Graphing Calculator by Mathlab PRO v3.2.86
Requirements: Varies with device
Overview: Graphing calculator with algebra. Essential tool for school and college. Replaces bulky and expensive handheld graphing calculators.

Description
If you're looking for a graphing calculator app that works smoothly and seamlessly, you've found it! Graphing Calculator by Mathlab is a scientific graphing calculator integrated with algebra and is an indispensable mathematical tool for students in elementary school to those in college or graduate school, or just anyone who needs more than what a basic calculator offers. It is designed to replace bulky and costly handheld graphing calculators and works on virtually any Android phone or tablet.
Furthermore, Graphing Calculator by Mathlab displays calculations as it performs them on the high-quality display of the Android device, making it easier for the user to understand the calculations and see them clearly. This app has two great strengths. First, it acts as a fine scientific calculator, but, more than that, it displays the intermediate steps of the calculations as you type. It allows the students to both watch and learn how the calculations are made and how to find the final answer. Second, the graphing ability is absolutely stunning! Not only does the calculator beautifully display the graphs, but it automatically generates the x- and y- values and displays them as well.
Help site with instructions and examples: http://help.mathlab.us
If you have a question, send email to [email protected]
SCIENTIFIC CALCULATOR
* arithmetic expressions +,-,*,/,ÃƒÂ·
* square root, cube and higher roots (hold root key)
* exponent, logarithms (ln, log)
* trigonometric functions sin p/2, cos 30Ã‚Â°, ...
* hyperbolic functions sinh, cosh, tanh, ... (hold "e" key to switch)
* inverse functions (hold direct function key)
* complex numbers, all functions support complex arguments
* derivatives sin x' = cos x, ... (hold x^n key)
* scientific notation (enable in menu)
* percent mode
GRAPHING CALCULATOR
* multiple functions graphing
* implicit functions up to 2nd degree (ellipse 2x^2+3y^2=1, etc.)
* polar graphs (r=cos2?)
* parametric functions, enter each on new line (x=cos t, y=sin t)
* function roots and critical points on a graph, tap legend to turn on and off (top left corner), use menu to display as a list
* graph intersections (x^2=x+1)
* tracing function values and slopes
* scrollable and resizable graphs
* pinch to zoom
* fullscreen graphs in landscape orientation
* function tables
* save graphs as images
* save tables as csv
FRACTION CALCULATOR
* simple and complex fractions 1/2 + 1/3 = 5/6
* mixed numbers, use space to enter values 3 1/2
ALGEBRA CALCULATOR
* linear equations x+1=2 -> x=1
* quadratic equations x^2-1=0 -> x=-1,1
* approximate roots of higher polynomials
* systems of linear equations, write one equation per line, x1+x2=1, x1-x2=2
* polynomial long division
* polynomial expansion, factoring
MATRIX CALCULATOR
* matrix and vector operations
* dot product (hold *), cross product
* determinant, inverse, norm, transpose, trace
LIBRARY
* user defined constants and functions (PRO)

What's New
Independent X&Y zoom, enable in graph settings.
Set function domain in graph menu.
2D scatter plots, enter coordinates in square brackets [0 1 2 3], select checkbox to show linear regression.
New functions min(), max(), gcd(), lcm(), mod(), round(), ceil(), floor(), trunc(), enter from latin keyboard.

Release Info:
Pro features unlocked

• By caffeine
Requirements: 4.0+
Overview: Instantly calculate and visualize all kind of percentage calculations Ã¢â‚¬â€ for free.

Description
It's the fastest way to calculate discounts, tips, interest and other percentage values.
Any input value can either be a source or result of a calculation Ã¢â‚¬â€ just enter the values you know and it will calculate the remaining one.
Supported Percentage Calculators and their possible use cases are:
Ã¢â‚¬Â¢ Value Calculator (Sales Tax, VAT, sSchool (mathematics, statistics, algebra), Fat Percentage in Food, Cooking Ingredients)
Ã¢â‚¬Â¢ Change Calculator (Percentage Increase/Decrease, Tips, Markups, Profit Margin, Shopping Discounts, Sale Price, Net/Gross Price; Return on Investment (ROI)
Ã¢â‚¬Â¢ Conversion Calculator (Convert Fractions)
Ã¢â‚¬Â¢ Growth Calculator (Business and Financial, Compound Interest, Inflation, Cumulative Growth, Compound Annual Growth Rate (CAGR), Doubling Time (Rule of 72))

WHAT'S NEW

- Increased digits precision up to 16 digits.
- Ads can be removed via In-App Payment.
- App is now movable to SD card.
- Minor design changes and bug fixes.

• By caffeine
Graphing Calculator by Mathlab PRO v3.1.84
Requirements: Varies with device
Overview: Graphing calculator with algebra. Essential tool for school and college. Replaces bulky and expensive handheld graphing calculators.

Description
If you're looking for a graphing calculator app that works smoothly and seamlessly, you've found it! Graphing Calculator by Mathlab is a scientific graphing calculator integrated with algebra and is an indispensable mathematical tool for students in elementary school to those in college or graduate school, or just anyone who needs more than what a basic calculator offers. It is designed to replace bulky and costly handheld graphing calculators and works on virtually any Android phone or tablet.
Furthermore, Graphing Calculator by Mathlab displays calculations as it performs them on the high-quality display of the Android device, making it easier for the user to understand the calculations and see them clearly. This app has two great strengths. First, it acts as a fine scientific calculator, but, more than that, it displays the intermediate steps of the calculations as you type. It allows the students to both watch and learn how the calculations are made and how to find the final answer. Second, the graphing ability is absolutely stunning! Not only does the calculator beautifully display the graphs, but it automatically generates the x- and y- values and displays them as well.
Help site with instructions and examples: http://help.mathlab.us
If you have a question, send email to [email protected]
SCIENTIFIC CALCULATOR
* arithmetic expressions +,-,*,/,ÃƒÂ·
* square root, cube and higher roots (hold root key)
* exponent, logarithms (ln, log)
* trigonometric functions sin p/2, cos 30Ã‚Â°, ...
* hyperbolic functions sinh, cosh, tanh, ... (hold "e" key to switch)
* inverse functions (hold direct function key)
* complex numbers, all functions support complex arguments
* derivatives sin x' = cos x, ... (hold x^n key)
* scientific notation (enable in menu)
* percent mode
GRAPHING CALCULATOR
* multiple functions graphing
* implicit functions up to 2nd degree (ellipse 2x^2+3y^2=1, etc.)
* polar graphs (r=cos2?)
* parametric functions, enter each on new line (x=cos t, y=sin t)
* function roots and critical points on a graph, tap legend to turn on and off (top left corner), use menu to display as a list
* graph intersections (x^2=x+1)
* tracing function values and slopes
* scrollable and resizable graphs
* pinch to zoom
* fullscreen graphs in landscape orientation
* function tables
* save graphs as images
* save tables as csv
FRACTION CALCULATOR
* simple and complex fractions 1/2 + 1/3 = 5/6
* mixed numbers, use space to enter values 3 1/2
ALGEBRA CALCULATOR
* linear equations x+1=2 -> x=1
* quadratic equations x^2-1=0 -> x=-1,1
* approximate roots of higher polynomials
* systems of linear equations, write one equation per line, x1+x2=1, x1-x2=2
* polynomial long division
* polynomial expansion, factoring
MATRIX CALCULATOR
* matrix and vector operations
* dot product (hold *), cross product
* determinant, inverse, norm, transpose, trace
LIBRARY
* user defined constants and functions (PRO)

What's New
2D scatter plots, enter coordinates in square brackets [0 1 2 3], select checkbox to show linear regression.
New functions min(), max(), gcd(), lcm(), mod(), round(), ceil(), floor(), trunc(), enter from latin keyboard.

Release Info:
Pro features unlocked

• By APK
SleepyTime: Bedtime Calculator PLUS v2.1.7
Requirements: 2.3+
Overview: Want to wake up refreshed? Every time you sleep, you enter into a series of sleep cycles that last for around 90 minutes, and waking up during one of the cycles will make you feel groggy and exhausted.

Nothing is more important than getting a good night's sleep, and waking up in a good shape let you make the most of your day! SleepyTime is an app designed to help you wake up in-between sleep cycles and allows you to start the day with a clear mind.
SleepyTime for Android allows you to try and work around this issue.
The app supports calculating when to wake up, when to go to sleep, and when to wake up if you sleep now. You can then set up an alarm to wake up at the right time. The app is perfect for those with a tight schedule, students, and pretty much anyone who wants to stay in top shape! Skeptical? Try it!
http://bits.blogs.nytimes.com/2013/02/27/test-run-sleepytime-a-bedtime-calculator
http://www.helpguide.org/life/sleeping.htm

===Reviews===
When Should You Be Waking Up?
http://thenerdyrobot.com/when-should-you-be-waking-up/
===What this app does===
-Calculates when to wake up and when to sleep to feel great
-Calculate when to wake up if you sleep now
-Get a list of possible times
-Add an alarm by clicking on a time
-Option to take into account the time it takes for you to fall asleep
-Option to use the 24 hours format or the AM/PM format
-Widgets on homescreen and lockscreen (Jellybean 4.2 +)
>Plus users get an enhanced widget.
===What this app does not===
-It's not an alarm app by itself, it only adds it to your android alarm clock app
-Cook for you
Inspired by sleepyti.me (by David Shaw).
Spanish translation thanks to Carlos VÃƒÂ¡zquez
Italian translation by Zokru
German translation by Ilian
Portugese translation by Antonio Pereira
Japanese translations by Yudai Kai (Ã§â€Â²Ã¦â€“Â Ã©â€ºâ€žÃ¥Â¤Â§)
French Translation thanks to Vincent Airiau
Arabic Translation thanks to i7mmodi
Hungarian translation thanks to Bihari KristÃƒÂ³f
Czech translation thanks to VilÃƒÂ©m Danzig
Contact me if you wish to translate this app!

Permissions:
-SET ALARM
Allows you to quickly set alarms based on when you want to wake up.
-INTERNET

WHAT'S NEW

2.1.7: Bugfix release
2.1.6: Fixed list animation bug on Android 5
2.1.3: Crashfixes on LG devices
2.1.2: Updated Hungarian translation and performance updates

SleepyTime Bedtime Calculator PLUS v2.1.7 - android-zone.ws.apk -  2.2 MB

• By caffeine
Nautical Calculator Pro v1.2 patched
Requirements: 2.3 and up
Overview: Nautical Calculator Pro performs calculations and produces graphs of various problems of navigation

DEAD RECKONING for Rhumb line and Great Circle Navigation, 1st problem: it helps navigator to determine his present position by projecting his past courses steered and speeds over ground from a known past position. He can also determine his future position by projecting an ordered course and speed of advance from a known present position. It does not allow for the effect of leeway, current, helmsman error, or gyro error.
Once latitude and longitude of a point are given, a route and a distance to go, the coordinates of the point of arrival are computed.

DEAD RECKONING for Rhumb line and Great Circle Navigation, 2nd problem: given the coordinates of departure and arrival, date of departure and speed, it calculates the routes and the distances of Rhumb lines and Great circles, the vertex coordinates, meridional parts, time spent in navigation and time of arrival.
Great-circle solutions for distance and initial course
angle are calculated.
A graphical representation is given.

The latitudes of points on the great-circle track is determined for equal Difference of Longitude intervals each side of the vertex, for equal DLo and DLa from point of departure, for equal no. parts Great Circle distance between points.
Time spent in navigation and time of arrival and a graphical representation is also shown.

Calculation of mixed Route : given the coordinates of departure and arrival and the parallel limit , calculate the coordinates of the two vertices the initial course and distance of the route with navigation mixed . This also shows a graphical representation .

Reducing a celestial sight to obtain a line of position
consists of some manual steps:
1. You correct the sextant altitude (hs) to obtain the observed altitude (ho).
2. You determine the bodyÃ¢â‚¬â„¢s GHA and declination.
3. You select an assumed position and find that positionÃ¢â‚¬â„¢s local hour angle.
4. Input all the above, then Nautical Calculator Pro computes altitude and azimuth for the assumed position and time of the observation,
5. and compares computed and observed altitudes.
6. and plots the lines of position up to four stars, having calculated how much space they are moved ahead tacking into account the shipÃ¢â‚¬â„¢s speed.
7. finally the fix coordinates are given
8.a beautiful graphic picture is shown

Compass Error By Azimuth Of The Sun at Sunrise and Sunset
As you input the latititude of the mariner and the sunÃ¢â‚¬â„¢s declination and the measured sunÃ¢â‚¬â„¢s azimut, the
computed azimuth to the azimuth measured with the compass immediately determines the compass error. No interpolation is necessary.

• By caffeine
Calculator-A simple & stylish PRO v1.4.8
Requirements: 2.3 and up
Overview: Is a simple calculator. It has support for big numbers(up to 12 digits). Calculator can add, subtract, multiply, divide, calculate percentage. Calculator supports the following calculation formula.

Description
Is a simple calculator.
It has support for big numbers(up to 12 digits).
Calculator can add, subtract, multiply, divide, calculate percentage.
Calculator supports the following calculation formula.
500Ãƒâ€”5%25
500ÃƒÂ·5%10000
500-5%475
500+5%525
It saves the value that you enter in the last.
It saves the clipboard.
Ã¢â‚¬Â» Calculator is free, but you can hide the ad by buying a plug-in extension.
[Features]
-Supports Home screen widget
-Copy to clipboard.
-Up to 12 digits.
-Horizontal screen support.
-The DEL key deletes the last digit entered.
-The DEL key long.
-Supports TABLET.
-Calculation memory support.
- History Display.
- History Save.
-Can change the theme.
-Can change the font.
-Can change the display format.
-Supports different Themes(Ninja BLACK/Samurai WHITE/Sakura RED/Yuzu YELLOW/Ajisai BLUE/Matcha GREEN)
-Supports different Fonts(ROBOTO/SERIF/SERIF BOLD/SERIF ITALIC/SANS SERIF/SANS SERIF BOLD/SANS SERIF ITALIC)

What's New
- Constant bug fixes
- Widget bug fixes
- Supports constant calculation
- Decimal point supports up to 12 digits
- Bug fixes of the decimal point
- Add a set of point
- History Display
- History save
- Bug fixes CE
- Corresponding to the widget Vibe
- Crash of HTC terminal corresponding

Release Info:
Pro features unlocked

• By caffeine
CALCU PREMIUM : The Ultimate Calculator v1.1
Requirements: 4.0+
Overview: CALCU is a simple, yet beautiful and powerful calculator.

Express your style with the calculator made just for you. Choose from 12 colorful, stylish themes to brighten your day while you calculate with ease.
CALCUÃ¢â€žÂ¢ is a breeze to use for everyday calculations, with all the scientific capability you need for work and school just a swipe away. And for your most demanding needs, CALCUÃ¢â€žÂ¢ allows you to add or remove the functions and constants you need to make the perfect calculator designed by you, for you.
The Droid Lawyer rates CALCUÃ¢â€žÂ¢ 4.5 out of 5, calling it Ã¢â‚¬Å“a great replacement for AndroidÃ¢â‚¬â„¢s stock calculatorÃ¢â‚¬Â... and we couldnÃ¢â‚¬â„¢t agree more!
Features
Ã¢Ëœâ€¦ Beautiful and intuitive interface with gesture based control and navigation
Ã¢Ëœâ€¦ See instant results of your calculations as you enter them
Ã¢Ëœâ€¦ Swipe down on the display to see calculation history
Ã¢Ëœâ€¦ Swipe up on the scientific keypad to customize it
Ã¢Ëœâ€¦ Create user-defined constants
Ã¢Ëœâ€¦ Choose between simple and full keypad layout
Ã¢Ëœâ€¦ Choose from 12 stylish themes

WHAT'S NEW

v1.1
improved language support
fix minor issues reported by users

• By APK
Geometry Calculator v1.0
Requirements: 4.0 and up
Overview: Geometric Calculator. Calculates plane and solid figures: Triangle, square, rectangle, parallelogram, rhombus, trapezoid, rectangle, polygon, circle, circle, ellipse. Sphere, cube, box, cylinder, cone, truncated cone, prism, pyramid, truncated pyramid, the octahedron.

Description
Geometric Calculator
Calculates plane and solid figures:
Triangle, square, rectangle, parallelogram, rhombus, trapezoid, rectangle, polygon, circle, circle, ellipse.
Sphere, cube, box, cylinder, cone, truncated cone, prism, pyramid, truncated pyramid, the octahedron.
triangle
- Parties
- angles
- Area
- Perimeter
square
- Parties
- diagonal
- Area
- Perimeter
rectangle
- diagonal
- Area
- Perimeter
parallelogram
- Diagonals
- Area
- Perimeter
rhombus
- Diagonals
- Area
- Perimeter
trapeze
- Area
- Perimeter
- Area
- Perimeter
polygon
- angles
- Area
circle
- Area
- The length of the arc
- Size of the sector
- The length of the arc segment
- The area of the segment
ring
- Area
- Size of the sector
ellipse
- Area
- Perimeter
-----------------
ball
- Area
- Volume
cube
- Area
- Volume
parallelepiped
- Area
- Volume
cylinder
- Area
- Volume
- The area of the lateral surface
cone
- Area
- Volume
- The area of the lateral surface
frustum
- Area
- Volume
- The area of the lateral surface
prism
- Area
- Volume
pyramid
- Area
- Volume
- The area of the lateral surface
truncated pyramid
- Volume
octahedron
- Area
- Volume

Geometry Calculator v1.0 - android-zone.ws.apk -  2.3 MB

• By caffeine
Requirements: 2.3 and up
Overview: Application was created for the purpose of thesis on "interactive textbook of Internet technologies."

It contains a list of all elements used in HTML 5 Explanation, see the browser and source code. The tests, which are then evaluated in the form of statistical tables. Sand, where one can try to write code that will automatically display it in the browser.

OVERVIEW
Ã¢â‚¬Â¢ more than 30 programming languages (Angular, Asp.net, C++, CSS, CSS2, CSS3, HTML5, Java, Javascript, jQuery, JSP, Lua, Perl, Php, Python, Ruby, SQL, SVG, VBScript, XSL-Fo, XSLT...)
Ã¢â‚¬Â¢ other languages, frameworks, schemas, shortcuts, commands etc. (Bootstrap, Canvas, Git, HTTP codes, jQuery mobile, Google maps, Linux, Regex, Rss, Subversion, VBScript, Vi, XML schema, Xpath, XSD...)
Ã¢â‚¬Â¢ 4 languages: english, german, czech, slovak
Ã¢â‚¬Â¢ sandbox - create your own code, display it in the browser, customizable
Ã¢â‚¬Â¢ award system - earn points, obtain medails
Ã¢â‚¬Â¢ skills quiz - prove, that you know answer every question
Ã¢â‚¬Â¢ fully customizable app in the settings
Ã¢â‚¬Â¢ HTML5 tools, details about tags and even more...
Ã¢â‚¬Â¢ simple statistics
Ã¢â‚¬Â¢ if you didn't found your language, there is option to help with translation texts in the application
Ã¢â‚¬Â¢ option to remove ads + support development
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Enjoy and have a nice day.