Perfect for Galloway Method
If you are a using a run/walk method for distance running, such as Galloway, Bingham/Hadfield, then this is the app to buy. Its functionally perfect for this use. The UI is a little clunky and non-standard, but no big deal. It is easy to setup and gives good audio cues for switching intervals. I have been using it to train for a half marathon and will use it on race day.
gadgetie about
Interval Run, v1.5