MarsDawn: Markdown Editor
Live preview, diagrams & PDF
Free · In‑App Purchases
Read the Markdown your agent wrote, on iPhone and iPad. Mermaid diagrams, math and code, rendered and easy to scan. Free to try for 14 days.
A Markdown reader for iPhone and iPad. Read what your agent wrote.
MarsDawn opens the Markdown files your AI agent writes — READMEs, specs, design notes — and shows them the way they are meant to be read.
What it is on iPhone and iPad
• A reader. Open a Markdown or text file with the in-app file picker and see it rendered. Editing stays on the Mac for now.
• No account, no sync and no cloud of its own. Files stay where they are.
Rendered, not raw
• Mermaid flowcharts, sequence diagrams and more, drawn right on the page.
• KaTeX math, highlighted code blocks, tables, task lists, block quotes and images next to the document.
• Front matter tucked into a small "Document info" panel.
Find your way around
• An outline of every heading. Tap one to jump there.
• Recent documents, one tap away.
Made for every size
• When the screen is wide enough, such as on iPad or an unfolded iPhone Duo, the outline and the page sit side by side.
• On iPhone, the outline opens as a sheet.
Four preview themes
• Dawn, Classic, Modern and Vivid, each in light and dark. Follow the system or choose one.
One purchase for Mac, iPhone and iPad
• Downloading is free. The first time you open a document, you can start a 14-day free trial.
• After 14 days, reading documents in MarsDawn needs a one-time unlock. The same trial and the same unlock cover MarsDawn on your Mac.
• No subscription. The trial doesn't renew or charge you. Your files never change, and other apps can still open them.
• English, Traditional Chinese, Simplified Chinese, Japanese, Korean, German, French and Spanish.
• No tracking.
A new dawn for Markdown.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
- Reads more HackMD and GitHub syntax: ==highlight==, ^superscript^, ~subscript~, a [TOC] table of contents, and callouts such as > [!NOTE] and :::info. A single ~x~ used to be strikethrough and is now subscript; use ~~x~~ for strikethrough.
- Japanese text uses Japanese fonts, collapsible blocks with blank lines inside stay in one piece, and a Mermaid diagram that doesn't parse shows the error with its line number.
The developer, Nan-Kuang Lee, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Nan-Kuang Lee
- Size
- 19.3 MB
- Category
- Developer Tools
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - iPad
Requires iPadOS 26.0 or later. - Mac
Requires macOS 26.0 or later. - Apple Vision
Requires visionOS 26.0 or later.
- iPhone
- Languages
English and 7 more
- English, French, German, Japanese, Korean, Simplified Chinese, Spanish, Traditional Chinese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Unlock MarsDawn $4.99
- 14-day Trial $0.00
- Copyright
- © 2026 Nan-Kuang Lee
