This app was mentioned in 3 comments, with an average of 1.67 upvotes
They have awesome apps! I tried to use paper and pen but could never seem to find it at 3 am, and everything is worse at 3 am.
This is the one I use https://play.google.com/store/apps/details?id=droso.application.nursing
It's so handy. You can start and stop feedings and pumping from your lock screen, track diapers and sleep and measurements and so on.
This is the one I use and I LOVE it! It tracks left vs right, has widgets with timers, you can also track formula and solid food. It also tracks physical development. Pumping....you name it, this app tracks it! It also shows daily timelines and trends for all categories.
https://play.google.com/store/apps/details?id=droso.application.nursing
I use this for breastfeeding tracking on Android: https://play.google.com/store/apps/details?id=droso.application.nursing
It has some other features as well, I like it. :)