# Aera vs Sleep Tracker

The clearest difference is in-app purchases: Sleep Tracker at none against Aera's 3. Sleep Tracker also leads on iOS requirement (18.0 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Aera sells 3 in-app purchases, starting at $9.99 per month. Sleep Tracker asks for nothing beyond the download.

Aera ships an update every 4 days, Sleep Tracker every 6 days. The most recent releases landed on October 25, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Aera | Sleep Tracker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 6 days |
| Size | 111 MB | 24 MB |
| Requires iOS | 26.0 | **18.0** |
| Devices | iPhone, Apple Watch | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Gergo Varga](https://appshunter.io/developer/1894205274) | [Sven Kraln](https://appshunter.io/developer/6816678493) |

## What reviewers say

### Aera

[App page](https://appshunter.io/ios/app/aera-sleep-and-running-tracker/id6762456252)

**Features:** Family Sharing, Apple Watch app

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Aera Premium Monthly | $9.99 | per month |
| Annual | $29.99 | per year |
| Aera Premium Lifetime | $99.99 | one-time |


### Sleep Tracker

[App page](https://appshunter.io/ios/app/sleep-tracker-cernidia/id6816678341)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Aera free?

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

### Is Sleep Tracker free?

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

### Do Aera or Sleep Tracker have ads?

Neither Aera nor Sleep Tracker shows ads.

### Which is updated more often, Aera or Sleep Tracker?

Aera ships an update every 4 days, and Sleep Tracker every 6 days. Most recently, Aera was updated on October 25, 2026 and Sleep Tracker on October 16, 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.*