# Ooooo — user reviews > 72 indexed App Store user reviews of Ooooo by Pavlos Tsochantaris, rated 4.80/5 from 121 ratings. - Source: https://appshunter.io/ios/app/ooooo/id1244537282/reviews - App overview in markdown: https://appshunter.io/ios/app/ooooo/id1244537282.md - Rating breakdown: 5★ 109 · 4★ 7 · 3★ 2 · 2★ 1 · 1★ 2 ## What do users think of Ooooo? Overall sentiment: positive **Pros** - 👍 Free and no ads - 👍 Simple and easy to use - 👍 Highly customizable - 👍 Works in the background - 👍 Effective for focus and sleep - 👍 No bloat or unnecessary features - 👍 Great value for free - 👍 Clear and high-fidelity sounds - 👍 User-friendly interface - 👍 Developer is altruistic **Cons** - 🐛 Frequency accuracy issues - 🐛 Limited frequency range (caps at 500Hz for some) - 🐛 Stereo might be broken for some users - 🐛 Small controls on iPad/Pro - 🐛 Does not support AirPlay **Commonly reported bugs** - App closes when phone goes to sleep or switches apps (needs background capability) - Frequency displayed does not match actual played frequency - Slider caps out at 500hz for some users - Stereo may not be working correctly for some users **Most requested features** - Higher mhz frequencies - Numerical input for precision - Green Noise option - Program sequences of beats and transitions (auto-pilot) - Dial into specific frequencies to the thousandth decimal point - Saved presets with labels - Ability to create automated presets with frequency changes over time - Full shortcut support - Add 40hz magic - Add pink noise - Add 0 frequency option to the watch - Add soft music or repetitive long tones, beach waves - Add the six main solfeggio frequencies (396 Hz, 417 Hz, 528 Hz, 639 Hz, 741 Hz, 852 Hz) - Add a sleep timer - Add a list of binaural frequency range names and definitions - Dual- or multi-frequency sliders - Add plus/minus buttons for fine-tuning frequencies - AirPlay 2 support ## Newest reviews (18 of 72) ### 5/5 — Thank You, Mr. Tsochantaris *2024-05-24, version 1.1.3* Your gift of this app to everyone, free of charge, no data mining, etc. illuminates your humble, character. Thank you, again for your kindness. I pray you are doing well. ### 5/5 — Exactly what I was looking for *2024-04-23* Exactly what I was like I long for. Beats and background noise without hassle. So you plan on adding updates? Noticed none recently. Creating saved presets w/ labels would be great to shift through ### 5/5 — Perfect *2024-03-26, version 1.1.3* This is a great tone generator. It’s easy to use and understand and works flawlessly. Free with no ads too. ### 5/5 — Perfect Sound App *2024-03-14* Everything about this app is perfect. I only wish there was a way to create an automated preset dropping the frequency or raising within a certain amount of time. Example: Start at THETA 6hz and set it to drop through theta to DELTA 1hz within 3hours. ### 5/5 — Finally *2024-03-03, version 1.1.3* Perfect, now I have full control. Thank you !! ### 5/5 — It’s real *2023-11-08, version 1.1.3* I love this app, I’ve used it for a couple days with it in the background while i sleep or work. I would love it if I could save presets for specific settings! ### 5/5 — Great free app for focus and meditation *2023-11-01* Love that I can completely customize the frequencies, tones, and noise type - and that I can also play music or listen to podcasts while it’s on - although I tend to use it on its own most of the time. My top pick for improvement would be full shortcut support - but as it is the app supports URL calls so I have this automatically start playing when I initiated a focus mode, and stop when I turn off the focus mode - it just ends up opening the app everytime. I do think some ready made configurations or configurable presets would be great, as well as the auto-pilot feature another reviewer mentioned - but that’s icing on an already great cake. Thank you to the developer for making this app free, simple & effective. Really appreciate it. ### 5/5 — Great free app for focus and meditation *2023-10-29* Love that I can completely customize the frequencies, tones, and noise type - and that I can also play music or listen to podcasts while it’s on - although I tend to use it on its own most of the time. My top pick for improvement would be shortcut support so that I could have this automatically start playing when I initiated a focus mode. I do think some ready made configurations or configurable presets would be great, as well as the auto-pilot feature another reviewer mentioned - but that’s icing on an already great cake. Thank you to the developer for making this app free, simple & effective. Really appreciate it. ### 5/5 — Thanks and respect to the dev *2023-07-03, version 1.1.3* I don’t know how to contact the developer of this app directly, so I’ll just write my thanks and praise here. First of all, thank you for creating a beautifully simple, elegantly functional, and truly useful app. Second, thank you for releasing it for free. No bells, whistles, unnecessary features or annoying adverts. No subscription, not even a one-off payment. Free. I don’t know exactly how much work goes into creating something like this but it’s not easy, I’m sure. I use this app along with Spotify every day to help me focus and ease the symptoms of my ADHD. Thank you once again. ### 5/5 — Perfect as a tinnitus sufferer *2023-06-13, version 1.1.3* This is just what I needed. I like brown noise and binaural sound to help me sleep and mask my low frequency tinnitus. During the day when it’s bothering me I listen to audiobooks but with this app I can listen to my book and have Ooooo playing brown noise at the same time which is bliss. Great, great app that I’m very grateful for! ### 5/5 — Great work Pavlos! *2023-05-31, version 1.1.3* As an iOS developer myself, I was looking for EXACTLY this or I was about to make it myself. Thank you Pavlos. You did an excellent job and representing the indie developer community perfectly - just a damn good product, that does what is should very well and no short term thinking ‘cash grab’ via advertisements. God speed on your future development plans! ### 5/5 — Close your eyes and let it take you *2023-05-10* I’ve used this app for a couple months off and on. It’s not a video game or advert for something else. Lightweight and to the point, I like it. Thank you. ### 5/5 — Thank You I will donate soon *2023-03-06, version 1.1.3* Simple to use and a little help Guide - nothing unnecessary. Thank you. Personally I think this app is the only one that’s using this properly ### 5/5 — 40hz magic *2023-02-06, version 1.1.3* Wanted an app no ads and simple with full control … thank you shared to my community!! Trying to find the best tone on the 40hz though. Right now liking 108hz tone on 40hz frequency… good healing and research behind it. Thanks 💚✅🏝️ ### 5/5 — This is the one your looking for *2023-02-05, version 1.1.3* Everything you need and free, no need for paid prescriptions like for the others, perfect ### 5/5 — Awesome *2023-02-02, version 1.1.3* Back when I had an android phone, I used an app called “BrainWaver”. When I finally grew completely fed up with android and switched over to an iPhone, I found that “BrainWaver” wasn’t available in an IOS platform. So I searched for and tried app after app, none of them providing them what I desired. The closest I’d found was “Binaural”. This app has now become my new favorite. It lacks a couple of features of “BrainWaver” but all in all it’s exactly what I’m looking for. ### 5/5 — Thank you, selfless human! *2022-12-26, version 1.1.3* What a great app. It does the job and is free (including ad free)! Amazing. Thank you for making this app and making it available for all! ### 5/5 — Delightfully focused app *2022-10-05, version 1.1.3* A refreshingly utilitarian little tool that does its job perfectly well without bothering its user with the usual log-ins, upgrade offers, subs, ads, feature bloat or faff. Sincere thanks to this clear-headed developer. ## Most critical reviews (10 lowest-rated) ### 1/5 — this app doesnt even play the frequency displayed *2022-09-10, version 1.1.3* put in a 432, started playing a frequency about 20-30hz flat, on top of that the slider caps out at 500hz, so you cant even get 528hz etc. dont know why you would keep this if it doesnt even do a good job at playing a tone that matches to the number displayed… cute ghost though. ### 1/5 — Not Binaural *2019-05-14, version 1.0.4* This app does not produce binaural effect. It generates two tones. The supposed binaural sound is that frequency in one ear on top of the tone. That is not how binaural effect is done. ### 3/5 — Add a 0 frequency option to the watch. *2018-11-18, version 1.0.3* Please add a 0 frequency option. If you do that you will have the only frequency generator on the App Store for watches. ### 4/5 — Almost perfect. Esp for free. *2026-01-12, version 1.1.3* If only it went to higher mhz and added a numerical input for precision. I almost feel like I should give 5 stars just for it being free! No ads! Yay! ### 4/5 — Love it *2023-09-27, version 1.1.3* This app is perfectly simple. I use the timer for pomodoro techniques and it works better for me than the pomodoro specific apps, which are all so bloated. Nice work dev, I’d buy you a beer if I had a method to do so. ### 4/5 — Great App, one recommendation *2022-07-28* Please add the ability for the app to run in the background. Anytime my phone goes to sleep or I switch to a different app it closes and the sound ends. Need a way to allow it to run both ways. ### 4/5 — Near perfect… *2021-11-11* This app is near perfect. If only there was an easier way to fine tune the frequencies like a plus (+) or minus (-) button on each side of the sliders that you could get the perfect frequency dialed in. Its somewhat frustrating to have to continually move the slider back and forth to try and get it just right. Alzo, if there were a way to create and save user presets, that would also be super duper useful. Other than that i would also like to pay you .99 for your efforts or tip you for making such a great app and being such a mensch for trying to give it away for free. Youre a beautiful & kind person. Thank you. If you are able to make the above mentioned changes, i will update the rating to a perfect five stars. That is all. Thanks again. ### 4/5 — minimalisticly good *2020-08-29, version 1.1.2* ... but disproportionatelly small controls on an ipad / pro ### 4/5 — Would be perfect with a couple of improvements *2017-11-16* This is a great app!! Simple, flexible, clear, it works while you have other apps/windows open, you can use it by listening to music from your device!!! Without complicated settings. I only have a couple of suggestions and I think it would be perfect! 1- provide half frequencies 2.5hz in another app, totally got rid of my migraines and muscle pain. 2- Add soft music or repetitive long tones, beach waves, etc. 3- I think the stereo part might be broken, I can only hear it on one side Overall, great job! Please make sure it works with future iOS releases so I can keep using it :) ### 5/5 — Simple and useful *2025-08-02, version 1.1.3* This app is everything an app should be free, simple, easy to use. Thank you! ## Most praised reviews (9 highest-rated) ### 5/5 — A Godsend *2025-07-25, version 1.1.3* It is so awesome that the developer built an app like this that is totally free with no ads, it is a godsend ### 5/5 — Would love just one more thing *2025-02-26* This app is fantastic! No bloat or anything, just the sounds and controls for it. Bless this developer for making such a user friendly sound app. Dev if you’re reading this, if you could possibly add Green Noise as well for a background sound that would be terrific. Thank you! ### 5/5 — Amazing!!! *2025-02-03, version 1.1.3* If you love meditation with binaural beats, this app is such a blessing. I don’t know how it isn’t more widely known, it’s one of my favourite apps I’ve ever discovered ### 5/5 — The best! *2024-12-05, version 1.1.3* Sleep with it and wake refreshed... brown noise binaural at 396 hz and turned up to about 11-15 volume ratio to whole = bliss ### 5/5 — Truly Fantastic *2024-11-23, version 1.1.3* I mean, it’s fully customizable and effective. It’s a great gift to everyone. ### 5/5 — Great App! *2024-10-03* Straight forward and to the point. Binaural beats without the bloat! Fantastic work. One feature request: the ability program a sequence of beats, and transitions. I.e the user can input 5 htz for 5 minutes. Ramp to 12 htz for 2 minutes, then ramp to 14 htz for 10 minutes. ### 5/5 — My favorite *2024-09-30, version 1.1.3* Simple, does what it says, and a cute theme little ghost to boot. ### 5/5 — Higher Frequencies? *2024-06-23, version 1.1.3* Hey guys! I really love the app and I use it almost daily. It is super simple and easy to use! I was wondering if you could make it go up to 1000Hz? That would really be so amazing🥰 cheers ✌️ ### 5/5 — Fantastic!! Any chance of…. *2024-06-09, version 1.1.3* This is f’n fantastic! So happy to be able to play this along with other audio! Thank you! Would it be possible, in a future update, to make it possible to dial into specific frequencies to the thousandth decimal point? I’d love to be able to dial in the Schumann Resonance (7.83hz), or the Golden Ratio (1.618hz). Thanks for the app and your consideration. --- *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 2026-09-05.*