Work out the bugs and its a 10!
The touch controls to stop or pause are not responsive about 80% of the time.
The controls for background music do not work at all.
The foreground sounds all sound the same with very slight variation. It also is not distinct enough at breaks to tell when to switch to exhale or inhale etc.
This could be an outstanding app but its got some huge issues!
Coke Zer0 about
Universal Breathing - Pranayama