Yes, Interval Timer ▸ HIIT & Tabata is completely free and it doesn't have any in-app purchases or subscriptions.
Not enough reviews to make a reliable assessment. The app needs more user feedback.
Interval Timer ▸ HIIT & Tabata is free.
To get estimated revenue of Interval Timer ▸ HIIT & Tabata app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.