apple_app_store_logo_300 2 GYM Counter can be adopted by trainers as well as by whose wanting to perform exercises at home reading a book or watching TV: while dedicated counters (Sets, Repetitions and Seconds) go on, a voice will alert you when you have to be ready to start, when you have to start each set or repetition and when you have to stop as well. You have not to worry about nothing else than setup properly your assistant filling in GYM Counter, at the beginning, the 5 auto-explicative fields as follows:

Number of total Sets: a number > 0
Rest between Sets (in seconds): a number > 0 when 'Number of total Sets' > 1
Repetitions for each Set: a number > 0
Duration (in seconds): a number > 0
Interval (in seconds): a number > 0 when 'Repetitions for each Set' > 1

Enjoy GYM Counter by pressing the button ‘Start’:
YouTube

Screenshots
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Usage Example
Starting GYM Counter
Configuration
Running on iPhone
Running on iPad