1. Home
  2. 💪 Health & Fitness
  3. Ooooo
Ooooo

Ooooo

Brainwaves, without gimmicks.

123 ratings
74 reviews
🌟 Lifestyle
💪 Health & Fitness
Free

Details

Released
June 17, 2017
Updated
July 21, 2026

Features

Developer

Pavlos Tsochantaris
✨Promote your app ✨
Ooooo screenshot #1 for iPhone
iphone
ipad
watch
📌Ready
Reviews summary↘︎
⭐74
Reviews↘︎
📝5+ tags
Tags↘︎
🔄6+ apps
Alternatives↘︎
❓5 answered
FAQ↘︎
📦~ in 4 months
Updates frequency↘︎
🖼️Get Icon
Icons↘︎

About

This app generates binaural beat audio waves to help you achieve specific mind-states like sleep, meditation, or energy. It offers a simple, offline experience without ads or in-app purchases, and includes an Apple Watch app for convenience.

✓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
Show original description

What users say about Ooooo

Reviews of Ooooo are mostly positive: the Health & Fitness app is rated 4.8/5 from 123 App Store ratings. What users like most: free and no ads, simple and easy to use. Top complaints: frequency accuracy issues, limited frequency range (caps at 500Hz for some). Summarized from real user reviews.

Positive things

  • 👍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

Negative things

  • 🐛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
See all reviews

What's New in Ooooo

1.2.0

July 21, 2026

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

User reviews

Most RecentHighest RatedLowest Rated

Calm Heart Rate

I’ve only used this app once, this morning, but it calmed my anxious heart rate in less than 2 minutes and it’s been calm all day. I’m excited to try it long term.
FFdbird

Fantastic!

Any way you could add some presets of the popular/most wanted frequencies?
Or even a list of those frequencies so we can put it in ourselves?
DDapoo777

Almost perfect. Esp for free.

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!
HHHelena Hex

Simple and useful

This app is everything an app should be free, simple, easy to use. Thank you!
Ddisalita

A Godsend

It is so awesome that the developer built an app like this that is totally free with no ads, it is a godsend
Hhallucinojerks
See 69 more reviews

Developer apps

Pebble Command
Pebble Command

by Pavlos Tsochantaris

🎮 Games

(1)

Free
Pocket Trailer
Pocket Trailer

Accelerate GitHub workflows

📊 Productivity

(3)

Free
Mode 3
Mode 3

An ultra-minimalist Roguelike

🎮 Games

(1)

Free
Let Me Zoom
Let Me Zoom

by Pavlos Tsochantaris

🔧 Utilities

(3)

Free
DAK - A most peculiar game
DAK - A most peculiar game

by Pavlos Tsochantaris

🎮 Games

(4)

Free
See developer apps

User experience

🐞

Reported Bugs

4 issues

App closes when phone goes to sleep or switches apps (needs background capability)

Bug

Frequency displayed does not match actual played frequency

Bug

Slider caps out at 500hz for some users

Bug

Stereo may not be working correctly for some users

Bug
✨

Requested Features

18 requests

Higher mhz frequencies

Feature

Numerical input for precision

Feature

Green Noise option

Feature

Program sequences of beats and transitions (auto-pilot)

Feature

Dial into specific frequencies to the thousandth decimal point

Feature

Saved presets with labels

Feature

Ability to create automated presets with frequency changes over time

Feature

Full shortcut support

Feature

Add 40hz magic

Feature

Add pink noise

Feature

Add 0 frequency option to the watch

Feature

Add soft music or repetitive long tones, beach waves

Feature

Add the six main solfeggio frequencies (396 Hz, 417 Hz, 528 Hz, 639 Hz, 741 Hz, 852 Hz)

Feature

Add a sleep timer

Feature

Add a list of binaural frequency range names and definitions

Feature

Dual- or multi-frequency sliders

Feature

Add plus/minus buttons for fine-tuning frequencies

Feature

AirPlay 2 support

Feature

FAQ

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.