Pacer

http://www.androidresearch.net Breathe in to the count of 5 (secs) then
breathe out to the count of 5 (secs). Then repeat. Imagine the breath coming into your chest (heart area) as you breathe in and going out from
your heart as you exhale. Allow yourself to feel the peace and joy in your heart
area. Sink into it. Choose from 3 feedback types - tone, voice or vibration. When you breathe in, your heart rate increases and conversely, when you
breathe out your heart rate decreases. This synchronization between breathing
and heart rate variation is called Heart Coherence - an optimum healthy state.
However, under stress, your breathing and heart rate becomes out of sync &
Heart Coherence is lost. Research shows that to achieve Heart Coherence,
the ideal breathing rate is about 6 breaths per minute (bpm). This
program trains you to breathe at 6 bpm (5 secs in-breath and 5 secs out-breath)