When you’re playing games that use dice, and you’ve left your d20 at home, just pull out your phone and you’re ready to go. But you need two twenty-sided dice? Just slide the “Number of dice” thingy. Amaze your friends. They’ll know that you’re not cheating, because it’ll speak the result, in the language of your device.
And why press things on the screen? Shake, shake, shake that phone.
Get it here! (Requires iOS 13)
This doesn’t work on the Mac version (requires macOS Catalina), obviously.