A simple concept executed with finesse. This exercise app does a good job building on regular exercise intervals to increase ability to do push ups. It might be nice to include in future versions the ability to modify the training by asking how easy the person found the workout and have the program adjust accordingly (an increase or decrease in push-ups).
Janus99 about PushUps for Beginners - 0 to 100+ Pushups Training, v1.4