# Ooooo vs Nurtli

The clearest difference is in-app purchases: Ooooo at none against Nurtli's 2. Ooooo also leads on device support (4 vs 1). Nurtli's advantage is update cadence (daily vs every 5 months) and iOS requirement (18.4 vs 26.0). On price and ads there is nothing between them.

Both are free to download. Nurtli sells 2 in-app purchases, starting at $4.99 per month. Ooooo asks for nothing beyond the download.

Ooooo ships an update every 5 months, Nurtli daily. The most recent releases landed on September 21, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Ooooo | Nurtli |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (121 ratings)](https://appshunter.io/ios/app/ooooo/id1244537282/reviews)** | — |
| Number of ratings | **121** | — |
| Positive reviews | 95.8% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Daily** |
| Monetization | Free | — |
| Size | 1 MB | 45 MB |
| Requires iOS | 26.0 | **18.4** |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Pavlos Tsochantaris](https://appshunter.io/developer/328330654) | [Alex Sheridan](https://appshunter.io/developer/1894946686) |

## What reviewers say

### Ooooo

[App page](https://appshunter.io/ios/app/ooooo/id1244537282)

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.

**Highlights:** 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

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Free and no ads
- 👍 Simple and easy to use
- 👍 Highly customizable
- 👍 Works in the background
- 👍 Effective for focus and sleep

**What reviewers complain about**

- 🐛 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

**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

**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


### Nurtli

[App page](https://appshunter.io/ios/app/nurtli/id6773480459)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Nurtli Plus - Monthly | $4.99 | per month |
| Nurtli Plus — Yearly | $39.99 | per year |


## Frequently asked questions

### Is Ooooo free?

Ooooo is free to download, with no in-app purchases.

### Is Nurtli free?

Nurtli is free to download, with in-app purchases available.

### Do Ooooo or Nurtli have ads?

Neither Ooooo nor Nurtli shows ads.

### Which is updated more often, Ooooo or Nurtli?

Ooooo ships an update every 5 months, and Nurtli daily. Most recently, Ooooo was updated on September 21, 2026 and Nurtli on September 30, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*