I have been using this app since bringing my my baby home and it has been wonderful for tracking diaper changes, feedings and pumping sessions.
Now I am working on a baby routine and cannot quite use the app anymore. I think with a modification you could market this to additional users. Baby whisperer recommends an eat, active and sleep routine. If you can provide a daily log that shows eat start time, active start time and sleep start time/duration, users would be able to track their routine and see what works and what doesnt.
Displacedcitygirl about Baby Timer