# Concentric Rhythm — user reviews > 30 indexed App Store user reviews of Concentric Rhythm by Jeff Holtzkener, rated 4.70/5 from 43 ratings. - Source: https://appshunter.io/ios/app/concentric-rhythm/id1188907944/reviews - App overview in markdown: https://appshunter.io/ios/app/concentric-rhythm/id1188907944.md - Rating breakdown: 5★ 36 · 4★ 3 · 3★ 2 · 2★ 0 · 1★ 2 ## Newest reviews (10 of 30) ### 5/5 — Fantastic. Great UI. Great results. *2018-09-04* Have barely started using this (in fact I didn’t even know what Euclidean rhythms even were until yesterday) , but the interface is so well put together that it strikes exactly the right balance between helping you just enough, without getting in the way, and lets you start experimenting straight away. Sounds great, looks great as well. ### 5/5 — Inspiring! *2018-04-21* I was looking for an app that would allow me to experiment with polyrhythms & this one is just great!.. 10/10 to the person who had this idea. It’s a beautiful, elegant interface, with a very well designed look & feel.. I would love to see a paid version with more features, like being able to string together sequences of patterns.. great!! Well done & thanks!! ### 5/5 — Fantastic App *2018-04-06* First app that caught my attention after inheriting an I phone. Just playing with these rhythms in the app is an endless source of entertainment, fascinating how how your attention is drawn from element to element when you listen to a loop over a long period. Have the capacity to output midi now so with a little bit of work and a suitable assigned drum rack in Ableton I should have the basis for some interesting tracks. Have to say I enjoy the quality of the included samples. ### 5/5 — My new go-to Euclid app *2018-03-29* This is a very high quality Euclidean sequencer. Enough said. ### 5/5 — PHENOMENAL *2017-12-31* This app is the perfect starting point to teach polyrhythms. Well made and good user interface. Thank you!! ### 5/5 — Excellent *2017-06-03* Stunning musical and educational app! For anybody interested in PolyRhythms this app is so much fun and full of great features including midi. ### 5/5 — What a wonderful work! Also suggestion! *2017-06-02* Option for auto-starting newly loaded project would be helpful ### 5/5 — Nice1 *2017-04-27* Love it ### 5/5 — Fun *2017-04-27* Good fun and can see this being useful... ### 4/5 — Innovative app, needs connectivity *2017-02-18* This is fine example of the brilliant minds at work creating IOS based music apps. It has a unique interface, and is already lots of fun to use. What it needs is connectivity. IAA, AU, Midi out and Link. Would be happy to buy these as IAP. Nic ## Most critical reviews (10 lowest-rated) ### 1/5 — Very low subdivision , 36 seriously 🥲 *2022-10-20* It would be the best sound app ever if it has a maximum of 96 beats but i dont know the developper choosed to put a limit of 36 please upgrade it to 96 or even 64 please ! ### 1/5 — Crashing a bit iOS 12 *2019-08-30, version 2.0* Hey Jeff I’m just trying this on iOS 12.3 and it’s crashing a bit. Are there any plans to make this an AUv3? ### 1/5 — Crashes on iPad Air 2 *2017-02-17* The app crashes every time about three or four seconds after I open it. ### 3/5 — Nice little app *2018-07-31* This is a very fun app to play with, I would suggest you save regularly as I have had a few crashes and midi export would be a really cool feature that is missing. ### 3/5 — Needs an iOS 11 update & Audiobus 3 support! *2017-12-10* Still works on iOS 11, but really needs to be updated to take advantage of Audiobus 3. ### 3/5 — Confused *2017-04-29* Excited by the app, so promising and lots to like. Then, I bought the midi out In-app purchase for $5 only to discover that the Audiobus integration doesn't support midi in Audiobus 3. That's kind of baffling. Hope it's gonna be added soon. I paid for midi out because I wanted to route midi from this app via Audiobus 3 to other Audiobus midi apps. Update: thanks to the developer for explaining. It might be worth communicating that in the app description (something akin to does not yet support Audiobus 3 but will.) **Developer response:** Hi, the Audiobus 3 SDK has not been publicly released yet! It has been presumably shared with the makers of many high profile apps, but it hasn't been made it available to the majority of developers yet. I'll definitely include it in a future update. ### 4/5 — Much improved from a few month ago! *2021-07-08* In my opinion this app has seen a lot of improvements since I used it a few months ago! I launched it inside AUM, as an interapp audio device on an audio channel. In the Concentric settings, I chose midi out to AUM, and set each separate concentric "ring" output to a separate midi channel. In AUM, I set up multiple instruments, on separate audio channels. I then filtered the incoming midi signals for each of these AUM instrument channels, to match the incoming Concentric midi channel I wanted to use. Seems to work so far! The app doesn't seem to tempo match with the AUM tempo. Can this be done?? The settings menu, and the organization of the input and control buttons, could benefit from some workflow improvements. ### 4/5 — Doesn’t work on iPhone 12 Pro Max *2021-05-27, version 3.0.4* The app quits a second after you open it. Not sure why, no other apps open so can’t be memory issue. Works on iPad, great app, and all other apps by this developer are awesome. ### 4/5 — Paying for midi outputs? *2018-09-06* Well Jeff, that post was 6 months ago? I wish I could show everyone the screenshot that I have with me. It says “Enable MIDI? Sending midi to other application/Devices is available as an in-app purchase ($4.99). If you would like to enable sending midi, select ‘Purchase Send MIDI’’. If you have reinstalled Concentric Rhythm and need to restore the purchase, select Restore Send MIDI’. It showed 6 months ago on 1 option. 1: Purchase Send Midi. After checking back 6 months later, it now shows 2 options. 1: Purchase send Midi. 2: Restore Send Midi. There was no restore send midi option when that post was made but if you were concerned about what people were saying, maybe you should pay close attention to your customers and ratings. I’ve updated my rating to 4. I had a conversation with this guy about making this app with 16 midi outputs a few months ago, even sent him some concepts. That’s when I paid for this app and midi outputs was part of the purchase. Now it still doesn’t even have 16 midi outputs and he’s charging people to use 1 midi output? Unbelievable. **Developer response:** This is somewhat misleading. The MIDI IAP lets you send each ring to a different MIDI channel. You can use up to 9 rings, so you can send to 9 different channels simultaneously (but you can assign each ring to any 9 of the 16 channels). I don't understand what you mean when you say I am 'charging people to use 1 midi output'? There are as many outputs as there are rings - and there are 9 rings. Most people don't even use all 9. Anyway, I do appreciate that you took the time to email me an alternative layout idea for the UI - but after consideration, I decided not to implement it. I found that adding more rings to the screen made the app more difficult to use. I love it that people send me their ideas for the app - but not all ideas are workable. ### 4/5 — Great features but sorely needs connectivity *2017-03-20* As Nkersov said. You can very easily generate good musical and rhythmic ideas with this app, in that respect it's excellent. But you can't take them anywhere as yet, which severely limits its utility in actually making music. Please developer, add MIDI out, Audiobus, etc.! That would definitely earn that final star. ## Most praised reviews (10 highest-rated) ### 5/5 — Amazing *2025-03-15* When I first picked this up 5 years ago (or whenever it came out), I didn’t fully appreciate the genius. I was still relatively new to music production and didn’t see how unique this gem really is. Over the years, I find myself using it more and more and more. It’s an amazing tool. I only wish I could get it for my old MacBook Pro! ### 5/5 — Love this tool *2021-08-18* Helps to really see what’s happening rhythmically. Wish it could create a notable transcription for performance. Wish it was on my Mac. Thanks George ### 5/5 — Great sound library *2021-08-14* Just missing a ride cymbal sound to be perfect! ### 5/5 — Revolutionary *2020-10-22, version 2.0* This program will change your rhythm composition workflow forever. Elegant UI, instant gratification, deep experimentation. Highly recommended. ### 5/5 — Amazing *2020-06-18* It’s amazing. Full stop. Intuitive layout, great design and aesthetic, extremely functional. I can’t say enough good things. ### 5/5 — Phenomenal *2020-05-17* This app is truly a life saver. I’m a pianist specializing in contemporary music, and I was searching for an app that I could program some of the polyrhythms that I’ve been encountering in my repertoire. I love that I can program something like 11:13, but I’m even more blown away that I can adjust it to account for dotted rhythms and rests. Ive been sharing this with practically all of my friends and colleagues in the field. Thank you Jeff for creating this! ### 5/5 — About perfect. *2019-12-02* I tried, but so far can’t find anything negative about this app. About as good as it gets as is! It is probably mathematically possible with all the transformations, but surprisingly I did not find an easy way of converting say a 6 note rhythm into 5 or 7 note one while keeping even distribution of notes around the circle. An “unwrap” feature could be handy, basically allowing user to convert the sequence into a more traditional rows/columns sequencer patterns (can be done by exporting MIDI into any piano roll type DAW but in app functionality would be useful). I also wish that turning the rings in relation to the other ones was not quantized and allowed in-between positions, this could create even more interesting rhythms. And if it was possible to divide any distance between two notes into subdivisions and create notes there... Once again, this app is about perfect and all above is just a fantasy... Edit: Not sure if this is a feature meant to prevent recording of IAA into an AB3 in the free version, but as soon as the AB3 is opened the app changes the sound into an echoey one and even after quitting AB3 the sound remains changed (comes back to normal if you quit the app and reload the project). IAA can be recorded in AUM without trouble which tells me the changing sound is a bug . ### 5/5 — Deep *2019-01-05* Amazing, amazing app. Percussion, melody, polyrhythms, midi-out—any kind of permutation you can imagine—all mixed together in glorious unison. ### 5/5 — Polyrhythm lovers need this! *2018-11-07* Easily create polyrhythms and morph them with different modes. A lot of fun. ### 5/5 — Fantastic app *2018-11-06* This is so much fun to play with! Thank you so much for developing this. --- *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 2026-09-02.*