Very good

This does exactly what it claims to do, nothing more, and does it very well. The definition of a good app.

That being said, there are three things that I would really, really like to see.

1. More available slots for custom interval sets, and/or the ability to hide the default sets.
2. The ability to make a copy of a set to make modifications
3. A choice of voices. Unfortunately, Im starting to curse the default voice-over guy so it would be nice to chose a different voice. Perhaps a choice of another male voice and two female voices to keep it interesting?

I havent checked out the Runner app because I have an iPod Touch, not an iPhone.

elymw about Interval Run