# Sleep Center Pro vs Aura CO2

The clearest difference is price: Aura CO2 at Free against Sleep Center Pro's $47.99. Aura CO2 also leads on in-app purchases (none vs 1). On update cadence, ads, device support and iOS requirement there is nothing between them.

Aura CO2 is free to download; Sleep Center Pro costs $47.99 up front. Sleep Center Pro sells 1 one-off in-app purchase. Aura CO2 asks for nothing beyond the download.

Sleep Center Pro ships an update every 2 months, Aura CO2 every 3 months. The most recent releases landed on October 20, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Sleep Center Pro | Aura CO2 |
| --- | --- | --- |
| Price | $47.99 | **Free** |
| Rating | **[4.2 (42 ratings)](https://appshunter.io/ios/app/sleep-center-pro/id1140153930/reviews)** | — |
| Number of ratings | **42** | — |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 79 MB | 59 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Apirox, s.r.o.](https://appshunter.io/developer/490081296) | [Elichens](https://appshunter.io/developer/1538561088) |

## What reviewers say

### Sleep Center Pro

[App page](https://appshunter.io/ios/app/sleep-center-pro/id1140153930)

This comprehensive sleep app helps you understand and improve your sleep. It features a recorder to track snoring and noise, a smart alarm to wake you gently, a tool to help stop snoring, and a library of relaxing sounds to aid sleep.

**Highlights:** Snoring and noise recording, Smart alarm for gentle wake-ups, Snoring detection and stopping, Relaxing sleep sounds library, Sleep cycle analysis and statistics, Apple Health integration

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Themes | $0.99 | one-time |


### Aura CO2

[App page](https://appshunter.io/ios/app/aura-co2/id1565190899)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sleep Center Pro free?

Sleep Center Pro costs $47.99, and also offers in-app purchases.

### Is Aura CO2 free?

Aura CO2 is free to download, with no in-app purchases.

### Do Sleep Center Pro or Aura CO2 have ads?

Neither Sleep Center Pro nor Aura CO2 shows ads.

### Which is updated more often, Sleep Center Pro or Aura CO2?

Sleep Center Pro ships an update every 2 months, and Aura CO2 every 3 months. Most recently, Sleep Center Pro was updated on October 20, 2026 and Aura CO2 on October 3, 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.*