# Anger Detection vs MD Preview

The clearest difference is in-app purchases: Anger Detection at none against MD Preview's 1. MD Preview's advantage is ads (none vs shown) and update cadence (every 3 days vs fortnightly). On price, device support and iOS requirement there is nothing between them.

Both are free to download. MD Preview sells 1 one-off in-app purchase. Anger Detection asks for nothing beyond the download.

Anger Detection ships an update fortnightly, MD Preview every 3 days. Both last shipped on September 11, 2026.

## The numbers

| Metric | Anger Detection | MD Preview |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (20 ratings)](https://appshunter.io/ios/app/md-preview/id6759583159/reviews)** |
| Number of ratings | — | **20** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 3 days** |
| Monetization | — | Free with in-app purchases |
| Size | 36 MB | 5 MB |
| Requires iOS | 17.7.2 | **16.6** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [Gejun Zhu](https://appshunter.io/developer/1879637857) |

## What reviewers say

### Anger Detection

[App page](https://appshunter.io/ios/app/anger-detection/id6736345208)

**Features:** macOS Compatibility

**In-app purchases:** none


### MD Preview

[App page](https://appshunter.io/ios/app/md-preview/id6759583159)

This app provides a clean and elegant way to read markdown files from various cloud storage services. It offers beautiful formatting, syntax highlighting for numerous programming languages, and customizable themes. An optional one-time purchase unlocks additional features like PDF export and custom font sizes.

**Highlights:** Open .md files from cloud storage, Beautifully formatted markdown rendering, Syntax highlighting for 180+ languages, Toggle between preview and raw markdown, Collapsible table of contents, 6 free reading themes, Export to PDF (premium)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MD Preview Premium | $2.99 | one-time |


## Frequently asked questions

### Is Anger Detection free?

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

### Is MD Preview free?

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

### Do Anger Detection or MD Preview have ads?

Anger Detection shows ads; MD Preview does not.

### Which is updated more often, Anger Detection or MD Preview?

Anger Detection ships an update fortnightly, and MD Preview every 3 days. Most recently, Anger Detection was updated on September 11, 2026 and MD Preview on September 11, 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.*