If you want to have a bit of fun, have to much time ;) or want to train some vocabulary indirectly:

https://play.google.com/store/apps/details?id=me.antonio.noack.revolvergame

another game of mine :D. It's like one of the "hacking" games from GTA 5
The Revolver (Learning) Game! – Apps bei Google Play

22480983s ago, by Antonio