This app was mentioned in 7 comments, with an average of 1.29 upvotes
Literally what Personal Capital is.
~~Link me: personal capital~~ bot grabbed the wrong one.
https://play.google.com/store/apps/details?id=com.personalcapital.pcapandroid
I don't use Android but I have the PC and iOS version: https://play.google.com/store/apps/details?id=com.personalcapital.pcapandroid&hl=en
I use the Personal Capital app to track my TSP balance. It's free and they have a nice website and Apple/Android app.
https://www.personalcapital.com/financial-software/mobile-app
Apple App Store: https://itunes.apple.com/us/app/personal-capital-banking-investing/id504672168
Google Play Store: https://play.google.com/store/apps/details?id=com.personalcapital.pcapandroid&hl=en