xLog

Still in testing.
An electronic journal for recording all types of fitness routines.
Weight training, HIIT, and yoga routines all work well in this app.
Use the timer features to keep you motivated and moving.
Continuous mode or coach mode allows the timer to act as a motivator to push through each exercise all the way till the final rep.
Continuous mode can also be applied to yoga routines to keep you moving, as each pose is announced before counting down to its start and automatically advancing to the next pose.
Create your own routines, get them from a trainer, or a friend.
Set goals. Keep track of your progress. Keep track of how your body changes over time. (Great for young lifters and athletes.)