# Air Markdown vs MHT Reader · Document Viewer

The clearest difference is in-app purchases: Air Markdown at none against MHT Reader · Document Viewer's 3. MHT Reader · Document Viewer's advantage is device support (4 vs 2) and iOS requirement (15.0 vs 17.0). On price, update cadence and ads there is nothing between them.

Both are free to download. MHT Reader · Document Viewer sells 3 in-app purchases, starting at $3.99 per 7 days. Air Markdown asks for nothing beyond the download.

Air Markdown ships an update every 3 days, MHT Reader · Document Viewer every 5 days. The most recent releases landed on August 27, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Air Markdown | MHT Reader · Document Viewer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 5 days |
| Size | 9 MB | 49 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [一铭 邢](https://appshunter.io/developer/6779709227) | [Rush Tools LLC](https://appshunter.io/developer/1896773547) |

## What reviewers say

### Air Markdown

[App page](https://appshunter.io/ios/app/air-markdown/id6779826151)

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

**In-app purchases:** none


### MHT Reader · Document Viewer

[App page](https://appshunter.io/ios/app/mht-reader-document-viewer/id6791883809)

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Weekly | $3.99 | per 7 days |
| Pro Annual | $9.99 | per year |
| Pro Lifetime | $24.99 | one-time |


## Frequently asked questions

### Is Air Markdown free?

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

### Is MHT Reader · Document Viewer free?

MHT Reader · Document Viewer is free to download, with in-app purchases available.

### Do Air Markdown or MHT Reader · Document Viewer have ads?

Neither Air Markdown nor MHT Reader · Document Viewer shows ads.

### Which is updated more often, Air Markdown or MHT Reader · Document Viewer?

Air Markdown ships an update every 3 days, and MHT Reader · Document Viewer every 5 days. Most recently, Air Markdown was updated on August 27, 2026 and MHT Reader · Document Viewer on September 22, 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.*