I recently received a pebble time, and letsmuv appeared to be the most comprehensive fitness app available.
While it does have a lot of features, it is lacking explanation of how to set them up or use them. I have yet to figure out the purpose of, or how to utilize sleep mode, and havent been able to get the stand alert to work.
The most frustrating thing is that my steps/muvs/calories/distance has not reset for a new day on the pebble, it's just adding to my previous total. It's refreshed on the web site to start again at 0, but not on the watch.
There is also not continuity of icons. There are different icons on the watch as there are on the app/web site that mean the same thing, but again, not a lot of explanation as to what they represent.
For now I will be switching to Misfit, but hope to return to Letsmuv after improvements.