Last updated on December 10th, 2025 at 04:43 pm
IOSU! – Music Game Review
IOSU! is a Music/Music/Action game from Float32 Inc, first launched in 11th April 2019.
It’s rated 4+ and currently has 340+ ratings on the App Store.
What Makes IOSU! Stand Out
Play rhythm game with your beatmap files. :)
Currently 4 Keys mode & 5×5 Keys mode are available!!
Other modes will be available soon!!
How to upload Beatmap files!
- Connect your iDevice and PC(Mac) to the same WI-FI network.
- Open provided URL on your PC(Mac).
- Upload your OSZ files.
This Music game offers engaging gameplay and regular updates for mobile players.
Player Feedback
As a newer release, IOSU! is building its player community. Early feedback suggests .
Recent Updates & Development
Latest Update: 11th April 2019
Download & Availability
IOSU! is available through the official App Store for iOS devices.
Requirements: Requires iPhone 5s / iPad Air / iPad Air (Cellular) / iPad Mini 2 (Retina) / iPad Mini 2 (Retina, Cellular) / iPhone 6 / iPhone 6 Plus / iPad Air 2 / iPad Air 2 (Cellular) / iPad Mini 3 or later.
Compatible with iPhone and iPad devices.
Player Experience Highlights
Community Insight:
On god this is the best one for iphone yall can trust us we wasnt paid we swear.
IOSU! Is very promising. Its fun to play and useful but theres a lack for some important features. The ability to customize things such as skin and scroll speed would be helpful and importing beatmaps directly inside the app would save a lot of time. The app also doesnt have a score system or really any sort of info about your plays except for a letter grade. Other than that, we didnt notice any issues while playing.
This game literally has almost no flaws at all. Its a decent game but if a few more things were added it would be way better, like landscape mode. We just feel like we would do better there, and custom note speed and skins, or at least basic skins that could just already come with the game like arrows circles or squares. But still a good game 100% recommend.
Even though it isnt the best experience, but we could definetly play this game when we want to launch osu but our pc is off.
Just amazing game and we havent even imported any beatmaps but ik its good we would like to see support for simfiles tho.
We love this games thank you so much for this.
The game is great, it has .osz files you can import from your pc so that you wont have to deal with default songs like other rhythm games. Its overall pretty good for a mobile rhythm game but it has key features that it is missing that includes: -external skins -offset -mods -settings -change language Other than that we can see this game has massive potential and that it would be more popular.
You just need to let us unlock songs not upload them.
Please make The game connect to Apple Music and you can play songs like that.
We have been trying to play osu on iOS and this is the best thing we have come across and we cant wait for standers mode.
After playing this game we will say that for the most part it does a very good job of emulating the beatmap files. One issue we noticed though was that the delay usually found in-game on osu! That occurs right before the notes start to appear is not included in this game as such some maps have a tendency to immediately start once prompted. This can be annoying as the player is forced to restart the song in order to hit the notes at a moments notice.
First of all, this is a great app, we love that we can play custom songs like this, and overall the app itself is pretty good. There are 2 things though that would make this app a 5 star. A: Songs start at the wrong time. Basically whenever you start a level, sometimes the notes will start underneath the area where you are supposed to click making a full combo impossible. B: Deleting songs via the website doesnt work. One other thing that would be nice to see would be a score system instead of just letter grades, so you could more precisely beat high scores. Otherwise great game.
We love this app, its wonderful and it works perfectly, if you could add more settings and features it should be one of the best music games ever.
Everything about it works as intended but we just wish that the app would help you with the downloading of the OSZ files. After finding out how to download the files and transfer them, its time to have fun. Its a great app, would recommend.
A big problem is that a song will starts and play for a few seconds and no notes will pop up until slightly after, causing to to miss some notes in the beginning no matter what. Also, instead of 4k drumrolls that go back and forth the patterns are a lot less fun as they are turned into drumrolls on the same note over and over.
Its a good game, but we think it would better if you added more options. We cant upload songs since we dont have a laptop or computer, so we only have the one options. More songs please.
Make audio delay adjustable and this game is perfect.
It would be nice to have the circle skins and to change to upscroll but other then that its good game also change skin colors.
Needs different skins, better hit reg and actually customizable scroll speed.
So this game is great. You can play with 4 keys, a board thingy, and 7 keys. You can also up the speed. One thing we would request is the ability to add mp3 or mp4 files and chart your own songs on mobile. We dont know if this is possible but we would like to see it happen :D.
This is a great game to and tons of fun but we just wish we could use the app while our phone is horizontal rather than vertical as sometimes it make hitting notes a bit annoying but overall great game.
The main part of the game we enjoy the most is that you port .osz files (executables for other rhythm games on PC) into this. However, the main problems we have include: Hit registration – Seems inconsistent at times Bar skin – we even play on bar most of the time (Yugen skin), but it is rather difficult to read especially for trills; you cant change it either Fail system – The hit registration makes it rather difficult to even pass regular maps so not being able to have a no fail setting on to never stop when the bar reaches 0 is not very fun Otherwise, getting into the game is really easy and simple granted you already have the .osz files.
Great concept, but sad theres no windows support (as in being able to upload files from windows.) guess ill stick to osu!mania till then, but im excited for the update. Also itd be sick if you could upload skin files too.
Game is probably one of the best mania esc games on mobile Ive seen given that you can use .osz files for maps, although we would love to see either maybe custom skins or a default circle, arrow, and diamond skin maybe? And idk if this is asking too much but a global ranking system would be kinda cool, Im not a game designer though so idk how hard that is to implement.
This is a real fun game. It seems like its only in its infancy, which makes us happy because theres so much potential. We would love to see them complete the game modes & maybe add a no-fail or something to that effect.
Please give us some haptics in future updates.
The way to add songs is tedious. Osu!mana songs can be downloaded from the website. You should be able to just download them straight from the phone. You should also be able to download skins and stuff. Finally our biggest complaint is that the game is stuck in portrait mode. Our fingers arent small enough to play like normal. It forces us to play thumbs. At that point Id just play piano tiles.
Overall a great game, but how come the url doesn't work? This prevents us from uploading more beatmaps. Please fix as soon as possible.
When will standered come out also 7k.
Um we really enjoy the idea of the game, but- the reaction of notes was off. For example- Id hit the note, but because our finger would be just slightly off, not even by a lot, it would count as a MISS. We mean- we guess thats fine, but you really need to know where your finger is landing before hitting. We honestly wouldnt try to play this game unless you have prior experience in playing rhythm games (and probably dont play on a ohone with 5×5 ).
We think the overall concept is great and uploading custom songs is both really easy and really neat. The auto mapping is quite good and we dont think much improvement is needed there. We would like to see some minor changes though: adding hit-sounds of any kind would be help immensely, adding a bit of delay between when you press play and when the song starts (like actual osu!), and better support for phones with a notch (move down health bar, song progress, and adjust the menu so theyre actually visible). Awesome concept but needs to be streamlined.
Pls add scroll rate change and pls add a way to get rid of that annoying flash effect when u press.
2 things that Id like to request is 3 key/tracks and being able to free play through songs without failing them/having to restart.
Its fine for mania aside from the broken long notes and latency issues. Still far better than most IOS 4 key rhythm games.
Great app, shame that there are lots of improvements that could be implemented (see the other reviews) that arent.
The only free app on the app store that does anything like this, but it can use a lot of work. The HP drain is way too harsh and the LNs and combo rush on mania are really broken. It can have a lot more features like no fail, or song rates (1.1, 1.2, etc.) As of now the game still needs a lot of work, if these improvements are made it would definitely be 5 stars.
So. The game works but we tried to import a file and it said the server op could not be found when we went back to the website we were leaded to.
User feedback from Apple App Store
App Details
- Version: 1.0
- Size: 32.10 MB
- iOS: 9.0 or later
- Languages: AR, HY, CA, CS, DA, NL, EN, FI, FR, DE, EL, HE, HU, ID, IT, JA, KO, MS, NB, FA, PL, PT, RO, RU, ZH, SK, ES, SV, TH, ZH, TR, UK, VI
- Content Advisory:
- Developer: Float32 Inc
Last updated: 11th April 2019 | Genre: Music, Music | Developer: Float32 Inc