MarkChart vs Simple Sequence Diagram AI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MarkChart
This app allows you to easily create and preview diagrams using a Markdown-inspired text syntax. It offers templates for various diagram types and supports automatic updates when used with external editors. Export your creations to common image formats.
- Mermaid diagram editing
- Real-time preview
- Built-in templates
- Automatic updates
- Export to PDF, PNG, SVG
- Syntax highlighting
- Dark Mode support
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Create beautiful Mermaid diagrams at the speed of thought. MarkChart gives you a focused editor, live preview, visual canvas, built-in templates, and polished exports in a native iPhone and iPad app. Mermaid is a Markdown-inspired syntax for defining diagrams with text. Use MarkChart to create flowcharts, sequence diagrams, state diagrams, class diagrams, entity relationship diagrams, Gantt charts, timelines, mind maps, Venn diagrams, pie charts, requirement diagrams, Git graphs, user journeys, and more. Start with a template, edit the Mermaid source with syntax highlighting, refine your diagram visually on the interactive canvas, then share it as PDF, PNG, or SVG. CREATE BEAUTIFUL DIAGRAMS Turn Mermaid text into polished diagrams in a focused iPhone and iPad app. EDIT MERMAID DIAGRAMS Create and edit your Mermaid diagrams directly in MarkChart. THEMES AND SYNTAX HIGHLIGHTING Choose polished themes and understand your diagram source with syntax highlighting. VISUAL EDITING Edit diagrams visually with the interactive canvas. TEMPLATES Instantly create sequence diagrams, state diagrams, flowcharts and more. DIAGRAM TYPES Create flowcharts, sequence diagrams, state diagrams, Venn diagrams, mind maps, timelines, Gantt charts, Git graphs, class diagrams, entity relationship diagrams, user journeys, pie charts, Sankey diagrams, XY charts, and more. QUICK LOOK Preview your .mmd and .mermaid files right from the Files app. EXPORT Easily export your diagrams to PDF, PNG, and SVG formats. SHORTCUTS Create automations with the Shortcuts app. FITS RIGHT AT HOME MarkChart is optimized for iOS and iPadOS, with Dark Mode support. MARKCHART PRO MarkChart Pro is an optional one-time universal purchase for iOS, iPadOS, and macOS. Privacy Policy: https://markchart.app/privacypolicy/ Terms of use: https://markchart.app/terms/ If you have any questions or ideas, please reach out at support@markchart.app
Simple Sequence Diagram AI
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This app allows you to easily create sequence diagrams. Simply describe the content you want to visualize, and the latest AI technology will automatically generate the diagram for you. Visualizing with sequence diagrams is crucial for organizing complex ideas. It helps ensure that all stakeholders understand the content, making it valuable in various scenarios. However, creating such diagrams manually can be time-consuming. With this app, you can generate sequence diagrams quickly and efficiently. Even with a rough outline, the app will automatically generate a sequence diagram, and you can make detailed adjustments as needed. It is used in various situations such as: - Visualizing API communication flows in software development - Managing user registration, authentication, and service usage flows - Structuring the flow of data transmission and responses in web services - Managing and visualizing customer support inquiry processes - Designing email and notification system workflows - Visualizing interactions between microservices - Structuring complex approval workflows in business processes - Tracking user interactions in e-commerce systems - Visualizing order to delivery processes in supply chains Please try it out whenever you need to create a sequence diagram. [Features] - Intuitive operability Ease of use is the most important factor. It runs smoothly, and you can intuitively edit your maps. - Ready to use You can use it immediately without registering an account. - Multi-device support It supports Google Drive integration, allowing seamless editing across multiple devices. - Export and Share You can export and share your Flowchart, and even edit them on a PC. - Import Exported files can be imported and edited. - Text-based editing Edit your sequence diagrams directly using Mermaid notation. - Dark theme support Since it supports a dark theme, it is also ideal for use at night.
Screenshots
Verdict
The clearest difference is iOS requirement: Simple Sequence Diagram AI at 15.6 against MarkChart's 18.2. On price, update cadence, ads and in-app purchases 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. MarkChart sells 1 one-off in-app purchase and Simple Sequence Diagram AI sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
MarkChart ships an update fortnightly, Simple Sequence Diagram AI every 2 weeks. The most recent releases landed on September 23, 2026 and September 9, 2026 respectively.
| Parameter | MarkChart | Simple Sequence Diagram AI |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (13 ratings) — better | — |
| Positive reviews | 72.3% of reviews | — |
| Number of ratings | 13 — better | — |
| Update frequency | Fortnightly | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Requires iOS | 18.2 | 15.6 — better |
| Further details — not scored | ||
| Size | 46 MB | 68 MB |
| Age rating | 4+ | 4+ |
| Developer | Alexandre Colucci | YUKI TANAIKE |
In-app purchases
MarkChart
- MarkChart Pro$12.99
Simple Sequence Diagram AI
- Simple Sequence Flow Pro (Monthly)$4.991 Month
- Simple Sequence Flow Pro (Annual)$44.991 Year
Questions
Is MarkChart free?
Is Simple Sequence Diagram AI free?
Do MarkChart or Simple Sequence Diagram AI have ads?
Which is updated more often, MarkChart or Simple Sequence Diagram AI?
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