I have no catchy title... feel free to suggest one :)
I have a couple of apps I find really useful for various aspects of practice and I thought I'd share them.
Yoga Timer - the yogic metronome. This is great for a yin or restorative practice where you want to spend x minutes in a pose before moving to the next one.
Way of Life - a goal tracker. Prove to yourself that you really can meditate for 9.75 minutes every day.
... and my favorite...
Muscles by RealBodyWork - see muscles of the face, arm, torso and leg. Pay a few extra dollars and get animations of common movements and the muscles that make it happen. (Apparently they also make nerves and other systems, too, if anatomy is your thing.)