This week's run had me jogging for 90 seconds and then walking for 2 minutes. I liked this infinitely better than the first week which had me jogging for 1 minute and then walking for 90 seconds. I felt like I couldn't get far enough in a minute that the same people couldn't see me start and stop (I'm very competitive).
The Runkeeper app lets you customize a run workout and then lets you know when your interval is over and what the next interval is. It also periodically lets you know your time, distance, and mile pace. When you are done, it gives you the summary of your workout and uploads it to the Internet where it stores everything.
Don't like running outside? No worries. The Runkeeper has a place where you can manually input your workout also to be stored online.
I give it two thumbs up!