Avoid

Loses track of where you are and even some settings (like beginner or intermediate). Tried full reinstall, but now it wont even remember my login and I have to enter all my credentials from scratch. Loved the workouts, but not if it takes me minutes just to set it up each day.

JamieSD2002 about 7 Minute Workout - Beginner to Advanced High Intensity Interval Training (HIIT)