Love this app
Use it to help with home exercise from physical therapy. No more keeping track of counting in my head and sets finished. Now with orientation you can view screen whatever position you use. This app inspires me to do my physical therapy every night. Improvements of app would be edit current set and save. Now one has to save new set and delete old set to make a change. Another improvement iCloud sync to use across devices iPad iPhone etc.
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Tabata Stopwatch Pro (Paid)