I just released a beta version of PlexFit Sleep Tracking App today to the Pebble App Store so that you guys can help test the sleep tracking algorithms. I would like to collect your feedback before integrating into PlexFit and make PlexFit a more complete health tracking app.
The screen is very rudimentary and not very pretty right now since I spent more time on the algorithms rather than the design. If you have any problem with the algorithms or if you guys find it inaccurate, please report so that I can fix it.
The goal is to make it solid before I can integrate it to PlexFit. Right now the app collects both the time-series data (to be plotted in the PlexFit Android app once the integration is done) so that you know what time you are awake and accumulative data (how many min you spent on sleeping and such). The watch app currently only shows how much time you are actually sleeping, in deep sleep and awake but it actually also collect other data as well (just waiting to be visualized in the PlexFit Android app)
You can get it here: PlexFit Sleep Tracking Beta