Mafia III is finally out for PC and various game consoles, but if you're looking for a smartphone port, this isn't it. We covered Mafia III: Rivals when it was initially announced, and it looked like your standard mobile RPG, as opposed to Mafia III's open-world gameplay. In both games, you are a crime boss attempting to rise through the ranks of New Bordeaux's criminal underworld. But that is where the similarities end.
While some of the negative reviews are from users expecting a straight port of Mafia III, others are justified. Rivals is extremely similar to the Walking Dead: Road to Survival mobile game, requires an active internet connection, and of course is pay-to-win. Some users are also reporting graphical issues. Buy hey, at least it's probably not capped at 30FPS like the full game.
There are over 1,000 five-star reviews at the time of writing, so at least a few people are enjoying it. You can download it for free from the Play Store right now.