What are some Great exercise apps?

joshuapack

I was looking around for a good exercise app. I mean, I have a hard time motivating myself to exercise. I just don't feel like doing it. So I would not just need an app that tells me different things I can do, I need something that will be fun and demands me to do stuff.

I seen that couch to 5K app. I think by active. I have not bought it yet, but let me know what you have used so I can get myself on some good habits.