While playing all fives dominos with friends and family, I looked for any good apps available for iPhone that would let me practice against a good AI and improve my game. Unfortunately, quite a few good apps are out there from a UX perspective, with all of them the AI was too easy to beat, so I set out to build my own. The result is an app that leverages different techniques for each AI difficulty level, roughly finetuned such that if your chance of beating a certain difficulty level, you are only half as likely to beat the next one up.
This project was my first time using Unity, as well as my first time building something for iOS, i.e., there are a few rough edges, but it is currently available, for free, both in the Apple Store and on itch.io, in case you want to check it out.