This app was mentioned in 2 comments, with an average of 1.00 upvote
Net Worth Calculator for Android. It's not automated like Mint, but it's simple and it works.
I use: https://play.google.com/store/apps/details?id=com.harleyc.networthcalculator
It is fairly rudimentary, but it helps me keep track of all my account balances over time.