I noticed a crash in the app, while opening it. There was a bug while parsing the global Steem blockchain data (the ones responsible for converting Vests to SP etc).
The app is now working correctly and an update was pushed to the play store. You should have received a notification about the update. If not, wait a little while and you'll get it eventually.
Feel free to leave a comment if you have any issues! The app is still under heavy development, so things may break from time to time! :)
Also, I've launched a simple website for my app! You can visit it here: https://steemi.app. I will be updating the website from time to time with info.