Hi Click download to download the calculator application by Farel Firanno, This application runs for- - Mac OS - Windows 7/10 - Android - Linux  File size: 1MB  * And don't forget to leave a comment and give your experience using the calculator app by Farel Firanno and I recommend for Windows and Linux OS to use the .apk converter because the file is an .apk and if you want to get the source code from the calculator you can call 085217991337 and pay 2 $