One Markdown vs SiYuan
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
One Markdown
A fast and simple editor for plain text, Markdown, and Textbundle formats. It offers full Markdown display, image previews, math formula rendering, and extensive customization options for themes and fonts. Includes tools for syntax input, table generation, and document outlining.
- Supports CommonMark and GitHub Flavored Markdown
- Full Markdown document display
- Image and math formula previews
- Customizable themes and fonts
- Markdown syntax input menu and keyboard
- Outline and word count view
- Editor & Preview mode
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One Markdown is a simple and fast editor that supports plain text, Markdown and Textbundle. It has the following features: * Base on CommonMark syntax and GitHub Flavored Markdown (GFM) extended syntax, supporting TOC, tables, code blocks, math formulas, task lists, footnotes, etc. * Display the text of the Markdown document completely without any deletion. * Images can be displayed directly in the Editor, supporting jpg, png, gif, webP, HEIC and etc. * Math formulas, mermaid and Echarts drawings can be previewed in the editor. * You can set your favorite font or multiple fonts for writing. * You can choose from 11 light themes and 21 dark themes, and also support custom themes. * There is a menu to facilitate the input of Markdown syntax, and a special Markdown syntax keyboard is also provided in iOS. * Convenient tools for generating and formatting Markdown table syntax. * You can view the outline and word count of Markdown documents. * Markdown documents can be previewed and support Editor & Preview mode. Terms of Use: https://www.mweb.im/onemarkdown-terms.html Privacy Policy: https://www.mweb.im/onemarkdown-policy.html PS: The lightweight choice is One Markdown. If you need a complete and powerful app, please take a look at MWeb, I hope you like it!
SiYuan
A privacy-focused personal knowledge management system that allows offline use and encrypted data synchronization. It combines blocks, outlines, and bidirectional links to help users organize and refine their thoughts.
- Privacy-first design
- Offline data storage
- End-to-end encrypted sync
- Block-based organization
- Outline structuring
- Bidirectional linking
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SiYuan is a privacy-first personal knowledge management system that supports complete offline use, as well as end-to-end encrypted data sync. Fuse blocks, outlines, and bidirectional links to refactor your thinking.
Screenshots
Verdict
The clearest difference is rating: One Markdown at 4.6 against SiYuan's 4.0. One Markdown also leads on review sentiment (82% vs 70%) and ratings volume (141 vs 29). SiYuan's advantage is update cadence (weekly vs monthly). On price, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. One Markdown sells 3 in-app purchases, starting at $3.99 per year and SiYuan sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
One Markdown holds the better App Store score, 4.6 against 4.0. Both are backed by a comparable volume of ratings — 141 and 29 respectively. Written reviews point the same way: 82% of One Markdown's written reviews are positive against 70% of SiYuan's.
One Markdown ships an update monthly, SiYuan weekly. The most recent releases landed on October 5, 2026 and October 15, 2026 respectively.
| Parameter | One Markdown | SiYuan |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (141 ratings) — better | 4.0 (29 ratings) |
| Positive reviews | 81.9% of reviews — better | 70.0% of reviews |
| Number of ratings | 141 — better | 29 |
| Update frequency | Monthly | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad |
| Requires iOS | 14.5 — better | 17.0 |
| Further details — not scored | ||
| Size | 50 MB | 419 MB |
| Age rating | 4+ | 17+ |
| Developer | 禄海 区 | Yunnan Liandi Technology Co., Ltd. |
Customer experience
One Markdown
SiYuan
In-app purchases
One Markdown
- One Markdown Yearly Subscribe$3.991 Year
- One Markdown for Mac$9.99
- One Markdown for iPhone/iPad$9.99
SiYuan
- PRO Features$79.99
- Subscription$188.99
