# Carbon Notes vs ZenFlow AI Markdown Editor

The clearest difference is update cadence: ZenFlow AI Markdown Editor at every 8 days against Carbon Notes's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Carbon Notes sells 2 in-app purchases, starting at $19.99 per month and ZenFlow AI Markdown Editor sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Carbon Notes ships an update every 3 weeks, ZenFlow AI Markdown Editor every 8 days. The most recent releases landed on September 29, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Carbon Notes | ZenFlow AI Markdown Editor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 8 days** |
| Size | 12 MB | 69 MB |
| Requires iOS | 17.6 | **16.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [YMMV](https://appshunter.io/developer/1224453829) | [发亮 刘](https://appshunter.io/developer/1830179467) |

## 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 |


### ZenFlow AI Markdown Editor

[App page](https://appshunter.io/ios/app/zenflow-ai-markdown-editor/id6789410391)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ZenFlow Pro Monthly | $1.99 | per month |
| ZenFlow Pro Annual | $5.99 | per year |
| ZenFlow Pro | $8.99 | one-time |


## Frequently asked questions

### Is Carbon Notes free?

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

### Is ZenFlow AI Markdown Editor free?

ZenFlow AI Markdown Editor is free to download, with in-app purchases available.

### Do Carbon Notes or ZenFlow AI Markdown Editor have ads?

Neither Carbon Notes nor ZenFlow AI Markdown Editor shows ads.

### Which is updated more often, Carbon Notes or ZenFlow AI Markdown Editor?

Carbon Notes ships an update every 3 weeks, and ZenFlow AI Markdown Editor every 8 days. Most recently, Carbon Notes was updated on September 29, 2026 and ZenFlow AI Markdown Editor on October 8, 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.*