Extremely mediocre at best

Osu is a somewhat good starting point for rhythm gaming if you dont know where to start or cant afford any of the games that are better than this. However, games like Cytus, Deemo, and Groove coaster show that Osu, while the premier rhythm game on PC, deserves little to none of the respect that its mobile competitors and computer counterpart have. Its just not good enough when you can get so much better for relatively the same price range, and it has none of the staying power on the App Store that those games better than it. It would probably even be off of the store if it didnt have the Osu name.
TL;DR: Osu is good on PC, but you can do WAY better on phone, and I mean WAAAAAAAAAAAAAY better on phone. If you are willing to spend a few more bucks on rhythm games, dont spend it on this. 2/5.

BenF2514 about osu!stream