Unitto — calculator, converter

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