# Markdown Mermaid vs Mdly

The clearest difference is price: Markdown Mermaid at Free against Mdly's $1.99. Markdown Mermaid also leads on iOS requirement (15.0 vs 18.0). Mdly's advantage is update cadence (every 2 weeks vs every 3 months) and chart position (#156 vs unranked). On ads, in-app purchases and device support there is nothing between them.

Markdown Mermaid is free to download; Mdly costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Markdown Mermaid ships an update every 3 months, Mdly every 2 weeks. The most recent releases landed on October 17, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Markdown Mermaid | Mdly |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | — | Paid |
| Best chart rank | — | **#156** |
| Size | 44 MB | 16 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Mark Duenas](https://appshunter.io/developer/1083533055) | [Yuta Hoshina](https://appshunter.io/developer/1822046671) |

## What reviewers say

### Markdown Mermaid

[App page](https://appshunter.io/ios/app/markdown-mermaid/id6757712908)

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

**In-app purchases:** none


### Mdly

[App page](https://appshunter.io/ios/app/mdly-markdown-viewer/id6759057599)

**Currently charting:** #156 Top Paid · Developer Tools (US App Store)

This app provides a fast, read-only experience for viewing Markdown and Mermaid files across Apple devices. It offers seamless iCloud synchronization, powerful rendering of modern Markdown features, and inline support for various Mermaid diagrams, all within a distraction-free interface.

**Highlights:** Read-only Markdown viewing, Mermaid diagram rendering, iCloud Drive integration, Full-text search, Table of Contents navigation, Dark and light themes

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Markdown Mermaid free?

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

### Is Mdly free?

Mdly costs $1.99, with no in-app purchases.

### Do Markdown Mermaid or Mdly have ads?

Neither Markdown Mermaid nor Mdly shows ads.

### Which is updated more often, Markdown Mermaid or Mdly?

Markdown Mermaid ships an update every 3 months, and Mdly every 2 weeks. Most recently, Markdown Mermaid was updated on October 17, 2026 and Mdly on October 16, 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.*