Could be great....

This app has exactly what I need-- the ability to personalize my interval training to make my own couch to 5K training program, and save it! But it has a bug that unfortunately makes it difficult to deal with; It will not let me share to Facebook because it wont let me login. It would be great if it would stay running in the background while you do other things, but it looks like you only have a minute or two to go back to the interval trainer before it closes. With these little tweaks it could be a five-star app.

ahbanbury about Interval Run, v1.8.1