# SmallChanges vs AItheaOS

The clearest difference is in-app purchases: SmallChanges at none against AItheaOS's 3. AItheaOS's advantage is iOS requirement (15.1 vs 17.0). On price and update cadence there is nothing between them.

Both are free to download. AItheaOS sells 3 in-app purchases, starting at $14.99 per month. SmallChanges asks for nothing beyond the download.

SmallChanges ships an update every 11 months, AItheaOS every 6 months. The most recent releases landed on November 8, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | SmallChanges | AItheaOS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | — |
| Update frequency | Every 11 months | **Every 6 months** |
| Size | 1 MB | 47 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | **iPhone** | — |
| Age rating | 4+ | 4+ |
| Developer | [嘉和 邱](https://appshunter.io/developer/1787282582) | [Shenzhen Erzhidian Technology Co., Ltd.](https://appshunter.io/developer/1865610265) |

## What reviewers say

### SmallChanges

[App page](https://appshunter.io/ios/app/smallchanges-daily-nudge/id6742430966)

**Features:** macOS Compatibility

**In-app purchases:** none


### AItheaOS

[App page](https://appshunter.io/ios/app/aitheaos/id6757254857)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AItheaOS Pro (1 Month) | $14.99 | per month |
| AItheaOS Pro (1 Year) | $119.99 | per year |
| Full Report Access | $2.99 | one-time |


## Frequently asked questions

### Is SmallChanges free?

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

### Is AItheaOS free?

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

### Which is updated more often, SmallChanges or AItheaOS?

SmallChanges ships an update every 11 months, and AItheaOS every 6 months. Most recently, SmallChanges was updated on November 8, 2026 and AItheaOS on November 9, 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.*