# Cerebyte vs CircadiaOS

The clearest difference is ads: Cerebyte at none against CircadiaOS's shown. Cerebyte also leads on rating (4.0 vs 3.8) and iOS requirement (13.0 vs 18.0). CircadiaOS's advantage is ratings volume (10 vs 1). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. Cerebyte sells 1 in-app purchase, starting at $4.99 per month and CircadiaOS sells 4 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Cerebyte holds the better App Store score, 4.0 against 3.8. That said, the two scores are not equally well evidenced: CircadiaOS has 10 ratings behind it against 1, so its average is the more settled of the two.

Cerebyte ships an update every 5 days, CircadiaOS every 3 days. The most recent releases landed on September 25, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Cerebyte | CircadiaOS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/cerebyte/id6760419256/reviews)** | [3.8 (10 ratings)](https://appshunter.io/ios/app/circadiaos-sleep-tracker/id6761959749/reviews) |
| Number of ratings | 1 | **10** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 days | **Every 3 days** |
| Monetization | Freemium | Free with in-app purchases |
| Size | 186 MB | 24 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 12+ | 17+ |
| Developer | [Electrodiagnostic Services Ltd](https://appshunter.io/developer/1884367183) | [CircadiaOS LLC](https://appshunter.io/developer/1892208236) |

## What reviewers say

### Cerebyte

[App page](https://appshunter.io/ios/app/cerebyte/id6760419256)

This neuroscience-based audio wellness app uses real brainwave recordings to help you achieve specific mental states like deep sleep, focus, or anxiety reduction. It offers personalized soundscapes and a unique approach to mental well-being beyond generic meditation or sleep sounds.

**Highlights:** Real brainwave recordings, Personalized soundscapes, Anxiety reduction states, Deep sleep audio, Focus and concentration tools, Wake up alarm, Guest access for trial

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cerebyte Gold | $4.99 | per month |


### CircadiaOS

[App page](https://appshunter.io/ios/app/circadiaos-sleep-tracker/id6761959749)

This app learns your body's ideal sleep temperature and automatically adjusts your smart thermostat throughout the night. It uses data from your wearable to personalize a four-phase temperature schedule for optimal sleep recovery. Requires a compatible smart thermostat and sleep-tracking wearable.

**Highlights:** Learns ideal sleep temperature, Personalized four-phase temperature schedule, Integrates with smart thermostats, Syncs with sleep-tracking wearables, Analyzes sleep quality, Two-week calibration period

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CircadiaOS Lite Monthly | $9.99 | per month |
| CircadiaOS | $19.99 | per month |
| CircadiaOS Lite Yearly | $99.99 | per year |
| CircadiaOS | $159.99 | per year |


## Frequently asked questions

### Is Cerebyte free?

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

### Is CircadiaOS free?

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

### Which has better reviews, Cerebyte or CircadiaOS?

Cerebyte is rated higher. Cerebyte averages 4.0 out of 5 from 1 ratings, while CircadiaOS averages 3.8 from 10 ratings.

### Do Cerebyte or CircadiaOS have ads?

CircadiaOS shows ads; Cerebyte does not.

### Which is updated more often, Cerebyte or CircadiaOS?

Cerebyte ships an update every 5 days, and CircadiaOS every 3 days. Most recently, Cerebyte was updated on September 25, 2026 and CircadiaOS on September 21, 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.*