Calculator, converter and more. Look for Calculator on your home screen after installing the app. • Deep customization: themes, number formatter and etc. • No ads, in-app purchases or asking for donations • Open source Calculator • Home screen widget • Copy, paste, save and share expression results • Trigonometric functions • Fractional output Unit converter • 590 units • Home screen widget • Built-in currency converter • Favorite units • Organize unit groups • Smart search algorithm Date calculator • Add and subtract dates • Calculate difference • Create events in calendar Time converter • Add to favorites • Add labels to time zones Permissions INTERNET ("full network access") Used in Unit Converter to update currency rates. Requests are made only when you select a currency unit. ACCESS_NETWORK_STATE ("view network connections") Used in Unit Converter as a callback. Retries to update currency rates if there was an error (no network, for example) and the Internet connection is back. WAKE_LOCK ("prevent device from sleeping") Not used explicitly in code. Added automatically by Widget feature. android.permission.RECEIVE_BOOT_COMPLETED ("run at startup") Not used explicitly in code. Added automatically by Widget feature. android.permission.FOREGROUND_SERVICE ("run foreground service") Not used explicitly in code. Added automatically by Widget feature. You can always check the source code and build the app yourself: https://github.com/sadellie/unitto