Tired of “free” Markdown apps that lock features behind a paywall? You’re not alone. Many Android Markdown apps advertise as free but then charge for basics like PDF export, cloud sync, or even dark mode.
We tested every Markdown app on the Play Store to find the ones that are genuinely free — no subscriptions, no one-time purchases required for core features, and no annoying upgrade nags.
Our Testing Criteria
We evaluated each app on:
- Truly free? — Can you use all core features without paying?
- Rendering quality — How well does it display formatted Markdown?
- Feature completeness — Diagrams, math, code highlighting, export?
- Ads — Does it show intrusive ads?
- Active development — Is it still being maintained?
The Best Free Markdown Apps for Android
1. MerMD — Best Free Markdown Viewer ⭐
Price: Free (no in-app purchases, no ads)
MerMD is a purpose-built Markdown viewer and reader that’s completely free with zero restrictions. Every feature is available to all users.
What’s included for free:
- ✅ Beautiful Markdown rendering
- ✅ Mermaid diagram support (flowcharts, sequence, Gantt, ER, class, pie)
- ✅ KaTeX math equation rendering
- ✅ Syntax highlighting for 20+ languages
- ✅ GitHub, Dropbox, OneDrive, GitLab integration
- ✅ Export to PDF, HTML, and images
- ✅ Dark mode with multiple themes
- ✅ Offline support
- ✅ No ads, ever
Best for: Reading documentation, GitHub READMEs, and any .md file with rich formatting.
2. Markor — Best Free Markdown Editor
Price: Free and open source (F-Droid + Play Store)
Markor is a mature, open-source text editor with Markdown support. It’s one of the most popular free editors on Android.
What’s included for free:
- ✅ Full Markdown editor with toolbar
- ✅ Basic Markdown preview
- ✅ To-do lists and task management
- ✅ File manager for local files
- ✅ Search and replace
- ✅ No ads
Limitations:
- ❌ No Mermaid diagram support
- ❌ Basic rendering (tables sometimes break)
- ❌ No cloud storage integration
- ❌ No math equation rendering
- ❌ Limited code highlighting
Best for: Quick note-taking and basic Markdown editing.
3. Obsidian Mobile — Best Free Note System
Price: Free for personal use (Sync/Publish are paid add-ons)
Obsidian is a powerful knowledge management system that uses Markdown files as its foundation.
What’s included for free:
- ✅ Full Markdown editor with live preview
- ✅ Bi-directional linking between notes
- ✅ Graph view of note connections
- ✅ Community plugins
- ✅ Local file storage
Limitations:
- ❌ Sync requires paid subscription ($4/month)
- ❌ Publish requires paid subscription ($8/month)
- ❌ No native Mermaid rendering on mobile
- ❌ Heavy app (designed for note systems, not viewing files)
- ❌ Can’t open standalone .md files easily
Best for: Building a personal knowledge base over time.
4. MarkdownX
Price: Free with ads
A simple Markdown editor with preview functionality.
What’s included for free:
- ✅ Markdown editing
- ✅ Basic preview
- ✅ Material Design interface
Limitations:
- ❌ Contains ads
- ❌ No diagram support
- ❌ No cloud integration
- ❌ Limited formatting support
5. Simple Markdown
Price: Free (ad-supported, premium removes ads)
A lightweight Markdown editor with preview.
What’s included for free:
- ✅ Side-by-side editing and preview
- ✅ File management
- ✅ Basic export
Limitations:
- ❌ Ads in free version
- ❌ No advanced features (diagrams, math)
- ❌ Premium required for some features
Comparison Table: Free Markdown Apps
| Feature | MerMD | Markor | Obsidian | MarkdownX |
|---|---|---|---|---|
| 100% Free | ✅ | ✅ | Partial | ❌ (ads) |
| No Ads | ✅ | ✅ | ✅ | ❌ |
| Mermaid Diagrams | ✅ | ❌ | ❌ | ❌ |
| KaTeX Math | ✅ | ❌ | Partial | ❌ |
| Syntax Highlighting | ✅ 20+ | Basic | Via plugin | Basic |
| Cloud Storage | 5 providers | ❌ | Paid sync | ❌ |
| PDF Export | ✅ | ✅ | Via plugin | ❌ |
| Dark Mode | ✅ | ✅ | ✅ | ✅ |
| Offline | ✅ | ✅ | ✅ | ✅ |
| Open Source | ✅ | ✅ | ❌ | ❌ |
| Primary Use | Viewing | Editing | Note system | Editing |
Why “Free” Matters for Markdown Apps
Markdown is a free, open standard. The philosophy behind Markdown is simplicity and accessibility — anyone can write and read it with any text editor. Charging for basic Markdown features goes against this philosophy.
That’s why MerMD is committed to being free forever:
- No freemium tiers — every feature is available to every user
- No ads — your reading experience is never interrupted
- No data collection — your documents stay on your device
- No subscription — install once, use forever
Which Free App Should You Choose?
If you need to READ Markdown files: → MerMD — unmatched rendering quality for free
If you need to WRITE Markdown: → Markor — solid free editor, open source
If you want a full knowledge system: → Obsidian — free for personal use (but sync costs extra)
If you need both reading and writing: → Install MerMD (for beautiful reading) + Markor (for editing)
Frequently Asked Questions
Is MerMD really completely free?
Yes. Every feature — Mermaid diagrams, KaTeX math, cloud storage, PDF export, dark mode, all themes — is free with no limitations.
Are there any hidden costs?
No. MerMD has no in-app purchases, no subscription, and no ads. The app is funded by the developer as an open-source project.
Which free app has the best Mermaid diagram support?
MerMD is the only free Android app that natively renders all major Mermaid diagram types: flowcharts, sequence diagrams, Gantt charts, ER diagrams, class diagrams, and pie charts.
Conclusion
You don’t need to pay for a great Markdown experience on Android. For reading and viewing Markdown files, MerMD gives you everything — diagrams, math, code highlighting, cloud storage, and PDF export — completely free. Download it from Google Play and experience Markdown the way it was meant to be read.
MerMD — 100% Free, No Strings Attached
Every feature unlocked. No subscription. No trial. No ads. Download MerMD free from Google Play.