Thanks! I went back and forth on open sourcing only because I think there may be potential for building a service like this for daycares in addition to parents. My decision to work on it stemmed largely from the ~20 different daycares my wife and I visited. All of them had a pen and paper tracking system for infants so it gave me lots of ideas.
I recommend an app called Baby Tracker on iPhone (not sure if theres an android version). I recently found out it even has an apple watch companion app. Very convenient.