# Ooooo — Brainwaves, without gimmicks.

> Generates binaural beat audio waves for various mind-states. (iPhone/iPad app by Pavlos Tsochantaris.)

- Source: https://appshunter.io/ios/app/ooooo/id1244537282 (this page in markdown: same URL + `.md`)
- Developer: [Pavlos Tsochantaris](https://appshunter.io/developer/328330654)
- Category: Health & Fitness, Lifestyle
- Price: Free
- Rating: 4.80/5 from 121 App Store ratings · 72 written reviews indexed
- Age rating: 4+
- Requires: iOS 26.0 · 1 MB
- Languages: American English, French (France), German (Germany)
- Released: 2017-06-17
- Data updated: 2026-08-01
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/ooooo/id1244537282/reviews.md

## What is Ooooo?

This is a straightforward app to help you achieve a chosen mind-state by generating what are known as "binaural beat audio waves" through your headphones, either from your iOS device or your Apple Watch.

Depending on the frequency that you pick, based on the chart included in the app, it can potentially help with sleep, meditation, relaxation, or even for getting a short burst of energy.

I have used similar apps for a while and have found them useful in helping me relax, or helping me float into a creative mood - Except most are overloaded with features that I never use and also cost money, have in-app purchases for "special programmes" and so on.

So I decided to build one that does the same, works offline, has no ads or spying, works well, and is free. There's also an Apple Watch app included which you can use if you're mediating or relaxing away from your phone.

As such, this app just generates the binaural frequency audio hum, and some optional white or brown noise to help mask outside sounds. You can then put it in the background and combine its audio with any other sound generator you like, or play music, radio, and so forth. All it does is to create the useful brainwave frequency, and then it gets out of your way.

## Key features

- Binaural beat audio generation
- Supports sleep, meditation, relaxation, and energy states
- Offline functionality
- No ads or in-app purchases
- Apple Watch app included
- Optional white/brown noise masking

## 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

## Recent user reviews (10 of 72)

All indexed reviews: https://appshunter.io/ios/app/ooooo/id1244537282/reviews.md

### 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!

### 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!

### 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
✌️

## Frequently asked questions about Ooooo

### What does this app do?

This app generates binaural beat audio waves through your headphones. These audio frequencies are designed to help you achieve specific mind-states, such as improved sleep, deeper meditation, enhanced relaxation, or a boost of energy.

### What are the key features of this app?

Key features include the generation of binaural beat audio, support for various mind-states like sleep and focus, offline functionality, an included Apple Watch app, and the option to add white or brown noise to mask external sounds. It is designed to be straightforward and free of ads or in-app purchases.

### How much does this app cost?

This app is completely free to use. It does not have any in-app purchases or advertisements, ensuring a straightforward and uninterrupted experience for users.

### What devices is this app compatible with?

The app is available for iOS devices, including iPhones and iPads. Additionally, it features an Apple Watch app, allowing you to use its features for meditation or relaxation directly from your wrist.

### What are common use cases for this app?

Common use cases include using the binaural beats to aid in falling asleep faster, achieving a deeper state of meditation or relaxation, or to help with focus and concentration for work or study. The optional noise masking can also be beneficial for blocking out distracting environmental sounds.

## Version history (last 5 releases)

### 1.2.0 — 2026-07-21

Big spring cleaning update, bringing internals up to date with the latest OS versions.

### 1.1.3 — 2020-10-23

Added an ending/sleep timer.

### 1.1.2 — 2020-05-08

Correction for a display issue on iOS 12 and earlier.

### 1.1.1 — 2020-02-24

• Fixed a recent regression that stopped ooooo:// URLs from working.
• Added support for x-callback-url to help automate Ooooo. See the help text for more details.
• Built with the latest toolchain for performance and stability.

### 1.1.0 — 2019-10-21

∙ New option to generate white or brown noise.
∙ Better handling of interruptions, like alarms, calls, or timers.
∙ Minor fixes and improvements.

## Apps similar to Ooooo

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [GOALS](https://appshunter.io/ios/app/goals/id1574490880) | — | Free | Health & Fitness |
| [Huff: Breathwork & Calm](https://appshunter.io/ios/app/huff-breathwork-and-calm/id1571808062) | 4.8 (346) | Free | Health & Fitness |
| [Ferrell Fit](https://appshunter.io/ios/app/ferrell-fit/id1572826780) | 5.0 (2) | Free | Health & Fitness |
| [Nutrition Tracker Diet  FITNOW](https://appshunter.io/ios/app/nutrition-tracker-diet-fitnow/id1574214280) | — | Free | Health & Fitness |
| [MutLab](https://appshunter.io/ios/app/mutlab/id1576343740) | — | Free | Health & Fitness |
| [Upmood OTA](https://appshunter.io/ios/app/upmood-ota/id1570756040) | — | Free | Health & Fitness |

## More apps by Pavlos Tsochantaris

- [Pebble Command](https://appshunter.io/ios/app/pebble-command/id328330651)
- [Pocket Trailer](https://appshunter.io/ios/app/pocket-trailer/id806104975)
- [Mode 3](https://appshunter.io/ios/app/mode-3/id912539457)
- [Let Me Zoom](https://appshunter.io/ios/app/let-me-zoom/id916568198)
- [DAK - A most peculiar game](https://appshunter.io/ios/app/dak-a-most-peculiar-game/id1035454689)

All apps by Pavlos Tsochantaris: https://appshunter.io/developer/328330654

## Related topics

[ooooo](https://appshunter.io/ios/topics/ooooo) · [ooooo brainwaves](https://appshunter.io/ios/topics/ooooo-brainwaves) · [oooo](https://appshunter.io/ios/topics/oooo) · [isochronic](https://appshunter.io/ios/topics/isochronic) · [binaural beats generator](https://appshunter.io/ios/topics/binaural-beats-generator) · [hemi sync](https://appshunter.io/ios/topics/hemi-sync)

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*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 2026-08-01.*