Easy calculator with a percentage keys and memory keys and many scientific functions

Features:
* Percentage key (%).
* Memory keys (M+,M-,Mr)
* Tape for calculation history.
* Answer key.
* Easy scientific calculator.
* Calculator shows work.
* RPN calculator.
* Free calculator app for download.

Scientific Calculator Features:
* Trig functions (sine cosine tangent), inverse trig functions and hyperbolic trig functions.
* Degrees and radians modes.
* Pi.
* Powers (square, cube).
* Logarithmic function (log) and natural logarithmic function (natural log or ln).
* Factorial function.
* Exponent function. The calculator can handle negative exponent, large exponent and decimal exponent.
* Square root and cubic root.
* Imaginary numbers function.
* Absolute variable function.

// Option A //

To download Calculator app mod from HappyMod.com.
You need enable the option "Unknown Sources".
1. Click on the above link to download Calculator app mod APK.
2. Save the file in your device Downloads folder.
3. Now tap on Install and wait for the installation to finish.
4. Once it is done, open the game and start playing it right away.

// Option B //

To download Calculator app from HappyMod APP, you can follow this:
1. Open your browser and download the HappyMod APK file from HappyMod.com - the only official website of HappyMod.
2. Open Android Settings and go into Privacy or Security.
3. Tap the option to Allow Unknown Sources and enable it.
4. Go to your Android downloads and tap the APK file.
5. Follow the directions on the screen to install it.
6. Search Calculator app in HappyMod App.