Shift your internal clock using your Fitbit data.
Website for download: Still under construction.
Full description:
  • Are you having trouble waking up in the morning naturally feeling alert and ready for work or school?
  • Do you need to adapt to a new wake/sleep schedule for shiftwork or travel?
If so, then the Shiftbit app can help you.
The Shiftbit app analyzes your circadian rhythms via your Fitbit heart rate data and then uses this information, in combination with a mathematical model of the human photic phase-response curve, to recommend times when to seek/avoid light in order to optimally shift your rhythms in the desired direction.