The app itself is a timer app, used to set timers for activities. Similar to the minutes prescribed in the Pomodoro technique, except 30/30 allows a range of timing. The app is free to download, as the payment is up to you.”
I never thought I’d live to see the day (I’m being facetious). Actually, this makes perfect sense. It’s another smart way developers can get around the apparent limitations in the App Store’s payment system.