I really enjoyed Dr Weissbleuths book and was looking forward to using this app to track and analyze my 2 month old babys sleep. The app did not capture my data; the app does not continue to track sleep unless it is open; the app only tracks total sleep (not sleep quality like nap length, time of day, etc.); you cannot edit notes (once a note is done it is fixed). While I would recommend Dr Weissbleuths book, I would highly recommend that you find another sleep tracking app! I am particularly disappointed as this is a paid app!