Yes I use actifit and I am one of the moderators. Actifit tends to reward users for keeping fit. There is an iOS and Android version. The application is accurate and it's always in development meaning if you encounter any issues it will be solved almost immediately.

Posting your activities on steemit is easy. You only need your posting key to do that and follow the instructions.

Users are upvoted based on their step counts with respect to the total number of entries received that day.

The ACTIFIT token will have value when SMT is launched and you can decide what to do with it. Either buy sport products, register for gyms and so on