Always been a grind, & some aspects a little wonky, but app was stable & a pretty fun game. Now, both before/after phone & app update, no longer worth playing. Intermittent audio, watching videos doesn't spawn rewards, quests/achievements don't update, items don't drop like they used to, & other issues. Didn't mind watching ads/vids for rewards & the gameplay was engaging enough (although repetitive). Uninterested in troubleshooting further, uninstalling after review.