Great App, why upgrade

This is a message more to the developers. You have a fine program here and as far as I can tell, the only difference between the Free version and the Paid version is the duration of sessions that are limited to / fixed at 5 minutes in the free version. I would encourage you to identify all other improvements that the paid version has over its free sidekick so that users of the free version can clearly see why they would want to upgrade.

TCMerrill about Breathing Zone Free - Relaxing Breathing Exercises