This app was mentioned in 2 comments, with an average of 1.50 upvotes
I'll submit an app and a game Solar Danmaku sits at 600 downloads https://play.google.com/store/apps/details?id=com.deepspaceexile.solar_danmaku
And pocket pool boy. A pool maintance app that is kinda a niche market
https://play.google.com/store/apps/details?id=com.deepspaceexile.Pocketpoolboy