# Carbon Notes vs ClauseCheck

The clearest difference is in-app purchases: ClauseCheck at none against Carbon Notes's 2. ClauseCheck also leads on update cadence (every 6 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Carbon Notes sells 2 in-app purchases, starting at $19.99 per month. ClauseCheck asks for nothing beyond the download.

Carbon Notes ships an update every 3 weeks, ClauseCheck every 6 days. The most recent releases landed on October 14, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Carbon Notes | ClauseCheck |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 6 days** |
| Size | 12 MB | 31 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [YMMV](https://appshunter.io/developer/1224453829) | [涛 刘](https://appshunter.io/developer/6785269438) |

## What reviewers say

### Carbon Notes

[App page](https://appshunter.io/ios/app/carbon-notes/id6748026908)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $19.99 | per month |
| AI Unlock | $4.99 | one-time |


### ClauseCheck

[App page](https://appshunter.io/ios/app/clausecheck-contract-diff/id6788023174)

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

**In-app purchases:** none


## Frequently asked questions

### Is Carbon Notes free?

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

### Is ClauseCheck free?

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

### Do Carbon Notes or ClauseCheck have ads?

Neither Carbon Notes nor ClauseCheck shows ads.

### Which is updated more often, Carbon Notes or ClauseCheck?

Carbon Notes ships an update every 3 weeks, and ClauseCheck every 6 days. Most recently, Carbon Notes was updated on October 14, 2026 and ClauseCheck on October 5, 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.*