Simple and Free
It is free so far so I love it!
Works perfect for Physical Therapy
The only thing I would add would be the ability to count sets as well as reps. I do six sets of three reps of (work then rest).
Not enough ratings yet to assess Simplest Tabata.
Simplest Tabata appears legitimate, with a few gaps. AppsHunter Legitimacy Score for Simplest Tabata is 73/100.
Based on 73 of 100 points across 7 verification signals from App Store and developer data.