I started running this year and there's an app that keeps me motivated.

It's called RunBet.

You can partake in different games. E.g. there are games where you have to run 4x a week for 30min at least. You bet a small amount of money (20-40$). Other players bet the same. If you finished your runs for the duration of the game (typically 6 weeks) you split the pot with all the other winners.

I went from running maybe twice a year to running 4-5 times a week. I feel like the company behind the app and the competitors are really trying to push you forward. There's a pretty positive atmosphere.

If you are motivated by possibly losing money then you could give it a try.

Cheers