the author of this app says:
Kapalbhati is the "bellows" breath. This is an energizing kriya. Great for clearing old air fully out of the lungs. A great practice to wake up to. It has the great side effect of massaging abdominal organs. Great for maintaining overall health and increasing energy. Listen to your music while doing the practice. Great for beginner and expert alike.
- Requires iOS 3.1.2 or later