This app was mentioned in 3 comments, with an average of 1.33 upvotes
https://play.google.com/store/apps/details?id=com.mustansir.fullterm
Let's you undo contractions and saves data automatically. Doesn't have sync, but lets you export to email. Has an iOS version, though.
I used one called "Full Term". Planning to use it again for baby #2 :)
It has a "labour phase reference" thing as well.
This one? https://play.google.com/store/apps/details?id=com.mustansir.fullterm
Thanks!