Like the 90 day work out programs?
Do you own more than one and have tried the "hybrid" schedules?
Do you want to take muscle confusion to the ultimate extreme?
Workout 90 Mix will do this and more. This app will generate the ultimate hybrid schedule based on the programs and routines you tell it you have. Each day, the app will remind you to workout and which workout to do that day, and will keep you guessing whats coming the next day.