# LE04 \| AR-909 Drum Machine — user reviews > 225 indexed App Store user reviews of LE04 | AR by Cooperator Design, rated 4.80/5 from 1,500 ratings. - Source: https://appshunter.io/ios/app/le04-ar-909-drum-machine/id1530586523/reviews - App overview in markdown: https://appshunter.io/ios/app/le04-ar-909-drum-machine/id1530586523.md - Rating breakdown: 5★ 1,344 · 4★ 104 · 3★ 31 · 2★ 12 · 1★ 9 ## What do users think of LE04 | AR? Overall sentiment: positive **Pros** - 🚀 Easy to use - 🚀 Intuitive interface - 🚀 Straightforward workflow - 🔊 Great sound quality - 🔊 Authentic 909 sound - 💰 Excellent value for money **Cons** - 🐛 Crashes when saving patterns - 🐛 Timing/sync issues with other apps - 🔌 Doesn't record MIDI/audio in DAWs - 📺 Screen doesn't fit some devices - 🔇 Limited sound customization options **Commonly reported bugs** - Crashes on startup for some users - Volume/parameter changes not retained - Timing issues when synced to other apps **Most requested features** - Pattern chaining/song mode - Ability to load custom samples - Separate audio outputs for drums - Longer pattern length options - Midi learn and mapping capabilities ## Newest reviews (13 of 225) ### 2/5 — Pas de canal MIDI en AUV3 *2026-06-06* Pouvoir utiliser l’app comme extension AuV3 est super utile, mais ne pas pouvoir changer le canal MIDI comme dans la version standalone est totalement bloquant pour l’utiliser dans un sequenceur moderne comme Koala par exemple (la reception MIDI par defaut est ‘omni’, la forcer sur le Canal MIDI 10 - communément utilisé pour les drumbox - serait un minimum). ### 2/5 — Have to delete app in order to use it every time *2025-04-24, version 1.4.2* Every time I create a pattern and close the app, when I open it back up the audio doesn’t work at all and have to reinstall ### 3/5 — Good but lacking *2025-04-11, version 1.4.2* This is a nice, well designed app. The lack of song mode, however, limits its usefulness significantly. If that feature were added, it would be a 5 star app. ### 3/5 — Confused *2025-03-14, version 1.4.2* I have owned this app since it came out but Apple is trying to charge me to download it on my new phone big bummer ### 3/5 — All fine until loopi pro *2024-12-25, version 1.4.2* Hi, i enjoy tris app a lot. Thanks. But i have a problem When i change presets from loopi pro using Leo04 909 like AUv a Lots of value turn down to cero… i want to now why? Fix tris and i get 5ft Star. XD. Sameway thanks ### 2/5 — Instabil unter IOS 18.1 *2024-11-14* An sich eine gute App, stürzt leider regelmässig als AUv3 in Garage Band ab, sobald ich von dem Plugin zu einer internen Anwendung von Garage Band wechsele ### 5/5 — The *2024-11-04, version 1.4.2* Best Drummers new and old and I between have fun! ### 5/5 — Amazing *2024-10-31, version 1.4.2* These guy’s always hit home runs with their apps and this no different. This was EXACTLY what I was looking for. Great sounds onboard and your power over them is fantastic. It’s a must buy in my opinion. ### 2/5 — There’s no way to record MIDI or audio from this plugin! Basically, this is a toy for your 5 YO… *2024-10-16, version 1.4.2* There’s no way record audio or MIDI from this plugin! Period. Congratulations, you’ve just bought yourself a toy for your 5 year old to play with. It sounds friggin great, but IMHO, calling it the greatest drum machine ever is not even close to the negative aspects of this plugin. Krist, the thing doesn’t even work with audiobus! It sounds great, but nobody will ever hear it! ### 2/5 — ce qui manque cruellement … *2024-10-11* - impossible d’exporter en .wav ou autre format - certaines fonctionnalités sont inopérantes : on/off des pistes ; on/off des effets … au vu de la date de la dernière mise à jour, ça m’étonnerait qu’il y ait une nouvelle … ### 5/5 — AR-909 review *2024-09-23, version 1.4.2* Nice easy powerful app. Makes adding a drum loop really easy. ### 5/5 — 909 is a great little app! *2024-09-19, version 1.4.2* This is fantastic! ### 4/5 — problems saving in Logic Pro :S *2024-08-31, version 1.4.2* I love the app, I'm a fan of the products they make and I have almost all of their synths, that's why I decided to buy these Drums, but it doesn't work well with Logic pro, every time I reopen a project it's not recorded. done with the Drums and I have to select it again and delete the pattern that is created by default which is very annoying, I hope they fix it because I really want to like these Drums, for this reason I would not recommend it for production unless they solve it ## Most critical reviews (10 lowest-rated) ### 1/5 — Please Update *2026-08-23, version 1.4.2* Wonky after all these years of no updates ### 1/5 — DO NOT BUY UNTIL UPDATED *2026-05-11, version 1.4.2* You will know when to buy again based on the most recent time it’s been updated Until this (it is currently May 11th 2026) do not purchase It’s a good plugin for the most part other than that ### 1/5 — DOESNT EXPORT MIDI *2025-10-26, version 1.4.2* Was extremely disappointed to find you have no way of actually exporting these drums in to a place like Logic. Fun to mess around with but not practical for getting the drum loops anywhere useful but your phone ### 1/5 — WONT RECORD IN CUBASIS 3 *2025-05-22, version 1.4.2* Running this in Cubasis 3 as a audio app it runs, but is not recording ... i was convinced it did a short while ago Im going to remove and redownload just incase and see what happens . ### 1/5 — Cool App but needs work. *2025-02-10, version 1.4.2* I love the concept and its quick n easy to use, however it has bugs. The most annoying one is it mutes it self after about a half n hour of use, or if you come back to use it, and the only way to fix it is to uninstall and re-install. I’ve had to do it 3 times after a couple of hours of use and decided to move on to another app. The other thing it has it might shoot an un-programmed sounds where there is none. Again had to clear the composition to fix this issue and start again. Also the don’t sleep function doesn’t work either (it goes to sleep) As a suggestion it would be good to have a click with the metronome, rather than a silent one. Looking forward to these improvements and would appreciate a refund asap please. Thanks. I tried reaching out to support prior this review but there’s none available. ### 1/5 — Unbrauchbar *2024-12-20* Klingt wie aus der Kinderzimmer-Hölle, die Presets sind zum größten Teil nicht zu gebrauchen. Ist zwar billig, aber selbst das bisschen Geld ist diese App nicht wert. ### 1/5 — Sounds great, doesn’t work very well. *2024-10-24, version 1.4.2* However it doesn’t retain settings when you close it, and loading it into Cubasis 3 requires you to reset them every single time. I mean literally every time you open the app you have to reset the settings. Then there is the weird noise issue it makes. I have the Limited Edition version, not sure if there is a difference. It also hasn’t been updated in 2 years. Good luck with it not blanking all of your settings either. Randomly macro turning everything off basically leaving you to wonder why it’s not making any noise at all. ### 1/5 — Un’occasione persa *2024-02-02, version 1.4.2* Do 1 Stella per 3 ragioni, la prima la totale mancanza di supporto (un manuale per spiegare come fare i mapping midi?). La seconda per la mancanza della funzione pattern chain/song mode e la terza per la mancata possibilità di poter mappare con il midi learn il bottone start/stop e il bpm (essenziale per un uso live). Peccato perché sarebbe un’app fenomenale. ### 1/5 — A drum machine with latency problems? *2023-11-03* No way, in AUM the latency of the bassdrum is around 25ms. And the hihat has a different latency, crazy! I have no other drum app with this latency. It‘s time to fix it if you can. Ok I like the sound a lot but the timing- behaviour is essential. Otherwise it‘s just a nice toy. ### 1/5 — Of no use whatsoever *2023-08-04, version 1.4.2* Does not record any of the patterns you create into your DAW. I have searched on line and there are no answers, only people with the same issue. So you can create pretty patterns, but all you can do is sit back and listen to them. They are of no use whatsoever as they will not record into your DAW. You can of course go into your piano roll and laboriously place each note that way, but that renders the sequencer an absolute waste of time. An UTTERLY pointless app. Go elsewhere. ## Most praised reviews (10 highest-rated) ### 5/5 — keep screen on no longer works *2026-08-05, version 1.4.2* absolutely love it, really appreciate getting actual synthesis on the phone, one problem is I got a new phone and it no longer respects the “don’t sleep” setting ### 5/5 — Very Good App , useful to make some first track and song *2026-06-29* Useful pages to séquence Drum track , and soundtrack •••• May be make some Banks to load easily from old TR series like 505 606 or 707 ??? It will be perfect !!! Fine app to complete with J6 or Super J8 ### 5/5 — still love, it still great,STILL DATA NOT COLLECTED *2025-10-30, version 1.4.2* dunno why it hasn't been updated in three years,maybe because it still works FANTASTIC 😍 ### 5/5 — Love it *2025-09-22* For this Price, the best what you can buy. A really fantastic drum Maschine with AuV3 Integration. ### 5/5 — хороша драм машинка *2025-09-19, version 1.4.2* з недоліків - наразі не завантажує пресет. потрібно перевибрати при запуску. в решті все добре. ### 5/5 — Awesome app *2025-05-24, version 1.4.2* U ### 5/5 — Practice *2025-03-22, version 1.4.2* My needs are simple and I like this as a metronome for practice (bass). I can plug it into the auxiliary of my amp and go. ### 5/5 — Fun et efficace *2025-03-03, version 1.4.2* Facile à utiliser. ### 5/5 — I have no1 mil for the don Patrick *2024-12-14, version 1.4.2* Shall play muffin for you pafkafkfk thegoldenagetoseefk footy fk ### 5/5 — It’s great… *2024-11-13, version 1.4.2* UPDATE - Just use Octachron to drive it! That kick timing issue won’t go away. Still it’s killer and worth having! --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-14.*