I use all of these everyday - minus the contraction one.
This is hands down the best app. AND it's free. I wish all parents knew about this app.
Nara Baby Tracker – Nara Organics, Inc.
We used this for our baby registry. I sill have access and it gives you lists to follow to make sure you are including all of the things. As a new mom I had no clue what I would need. This was super helpful.
Babylist - Find a Registry
I wish someone would have told me about this from the beginning. We missed out on so many rewards because I had no clue we could collect them.
Pampers Club - Rewards & Deals - Apps on Google Play
I used the free version to keep track of my contractions. It even has an alert to tell you when to go to the hospital.
Contraction Timer & Counter 9m - Apps on Google Play
Even if you do not have the sock this app can help you track your babies sleep and wake windows. It is super accurate with the sleep windows too. This way me and my fiancé are always on the same page for when baby girl needs to take a nap.