# Cal Dedup vs Markdown Viewer Editor

The clearest difference is price: Cal Dedup at Free against Markdown Viewer Editor's $4.99. Markdown Viewer Editor's advantage is in-app purchases (none vs 1) and device support (4 vs 2). On update cadence, ads and iOS requirement there is nothing between them.

Cal Dedup is free to download; Markdown Viewer Editor costs $4.99 up front. Cal Dedup sells 1 one-off in-app purchase. Markdown Viewer Editor asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 16, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Cal Dedup | Markdown Viewer Editor |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Size | 28 MB | 33 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Zhihao Yang](https://appshunter.io/developer/1466209376) | [Hefei Yunyilian Intelligent Technology Co., Ltd](https://appshunter.io/developer/1541792997) |

## What reviewers say

### Cal Dedup

[App page](https://appshunter.io/ios/app/cal-dedup-no-more-duplicate/id6759738516)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CalPurge Pro | $1.99 | one-time |


### Markdown Viewer Editor

[App page](https://appshunter.io/ios/app/markdown-viewer-editor/id6762539454)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Cal Dedup free?

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

### Is Markdown Viewer Editor free?

Markdown Viewer Editor costs $4.99, with no in-app purchases.

### Do Cal Dedup or Markdown Viewer Editor have ads?

Neither Cal Dedup nor Markdown Viewer Editor shows ads.

### Which is updated more often, Cal Dedup or Markdown Viewer Editor?

Cal Dedup ships an update every 2 months, and Markdown Viewer Editor every 2 months. Most recently, Cal Dedup was updated on September 16, 2026 and Markdown Viewer Editor on September 10, 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.*