MermaidEditor vs do over
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MermaidEditor
Create and edit diagrams and charts using mermaid-js syntax with real-time preview. Export your creations as PNG or SVG files and share them across all your Apple devices.
- Mermaid-js syntax highlighting
- Code completion
- Instant preview
- Export to PNG/SVG
- Cross-device editing
- QuickLook preview extension
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MermaidEditor is a diagram and chart editor, powered by mermaid-js. And MermaidEditor supports iPhone, iPad and Mac, with one app you can edit diagram everywhere on any device. MermaidEditor supports mermaid-js syntax highlighting and code completion, so it can help writing diagram and chart clearly, easily and quickly. You can also easily export charts as PNG images or SVG files from the editor, or share image to other people with system actions. √ All Platforms - Both Mobile and Desktop platforms supported, you can edit diagram documents on iPhone, iPad or Mac - Document browser based app, easily edit files on device and sync document between devices - Multiple windows ready, it makes the editor more powerful on iPadOS - Keyboard shortcuts ready on iPadOS with keyboard connected √ Powerful Editor - Syntax Highlighting for mermaid-js grammar - Auto Completion in editor helps typing keywords quickly - Code Snippets likes parallel block in sequence diagram makes life easier - Instant Parsing Error indicator for locating syntax error √ Instant Preview - Auto Generated Preview when typing in editor - Zoom and Pan to move preview for checking diagram's detail - With Scroll wheel it can be easily zoom diagram on macOS √ Integrated Extensions - Thumbnail support, every .mmd file will has its own thumbnail when saving file - QuickLook Preview extension helps you preview mermaid document in Files app on iPhone or iPad and Finder on macOS √ Sharing - Save diagram document as its source with .mmd extension - Export diagram to PNG image or SVG file with one click For mermaid-js grammar, please visit https://mermaid-js.github.io/mermaid/ for documentation.
do over
This tool allows for real-time text manipulation and template merging. Easily substitute values and placeholders to see how your merged content will appear instantly. It supports multi-step substitutions for complex text generation needs.
- Real-time template text changes
- Customizable placeholder usage
- Preview merged results
- Multi-step substitutions
- List of values input
- Template input
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- Want to quickly and easily change the values and template text and see the results in realtime? do over can do that. - Want to use a different placeholder in the template? do over can do that. - Want to see how the merged results will look using different joins? do over can do that. - Want to be successful in life? do over, unfortunately, cannot do that. Provide a list of values (apple banana coconut … zucchini, for example) along with a template to use (such as ?i. ?), and do over generates merged output: 1. apple 2. banana 3. coconut … 26. zucchini do over can do multi-step substitutions as well.
Screenshots
Verdict
The clearest difference is rating: do over at 5.0 against MermaidEditor's 2.3. MermaidEditor's advantage is ratings volume (10 vs 1) and chart position (#108 vs unranked). On update cadence, 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
MermaidEditor costs $3.99 and do over $5.00 up front. Neither carries in-app purchases, so what you see is what you pay.
do over holds the better App Store score, 5.0 against 2.3. That said, the two scores are not equally well evidenced: MermaidEditor has 10 ratings behind it against 1, so its average is the more settled of the two.
MermaidEditor ships an update every 3 weeks, do over fortnightly. Both last shipped on October 30, 2026.
| Parameter | MermaidEditor | do over |
|---|---|---|
| Price | $3.99 — better | $5.00 |
| Rating | 2.3 (10 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 13.8% of reviews | — |
| Number of ratings | 10 — better | 1 |
| Update frequency | Every 3 weeks | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | #108 — better | — |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, Mac |
| Requires iOS | 14.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 125 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | 基伟 徐 | Richard Koopmann |
Customer experience
MermaidEditor
do over
In-app purchases
MermaidEditor
No in-app purchases
do over
No in-app purchases









