Data Modeler vs MarkChart
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Data Modeler
Effortlessly create, visualize, and export complex data models for your projects. Design entities, relationships, and attributes with an intuitive editor. Add data to test your models and export them as JSON documents or diagrams.
- Intuitive data model editor
- Create entities, attributes, and relationships
- Define cardinalities and relationship types
- Add and store data within models
- Visualize models as ER diagrams
- Export data as JSON documents
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Data Modeler: Create, Export, and Visualize Your Data Models With Data Modeler, you can effortlessly create complex data models for your app, website, or database project. Create entities and relationships, and define attributes and cardinalities with ease. The editor is intuitive and responsive, with a wide range of tools at your fingertips. Once you have your data model set up, you can add data to it to make sure it works as expected. And when you're satisfied with your data, you can export it as JSON, so it's ready to use in your projects. You can also view it as a JSON diagram, making it easy to understand its structure and relationships at a glance. Create Complex Data Models with Ease: - Design data models quickly and efficiently with a responsive and intuitive editor. - Add entities, attributes, and cardinalities with a wide range of tools at your fingertips. - Create relationships between entities and define the type of relationship, cardinality, and properties with ease. - View your data models as an ER diagram to quickly understand their structure and relationships at a glance. Add and Export Data as JSON: - Add and store data from your data models with a responsive and intuitive editor. - View your data as a JSON diagram to quickly understand their structure and relationships at a glance. - Analyze complex data models with ease, and identify areas for improvement. - Export data as JSON document to use in your projects. In summary, Data Modeler is an easy-to-use app that simplifies data modeling by providing a responsive and intuitive editor, the ability to add data to those data models, and the ability to export data as JSON and visualize them with a JSON diagram. Whether you're a developer, designer, or project manager, Data Modeler has something to offer to improve your workflow and streamline your projects. Happy Data Modeling! ------- Terms of use: https://aarkaystudio.com/terms Privacy policy: https://aarkaystudio.com/privacy
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
Screenshots
Verdict
The clearest difference is rating: Data Modeler at 4.4 against MarkChart's 4.0. Data Modeler also leads on update cadence (every 5 days vs every 3 weeks). MarkChart's advantage is review sentiment (73% vs 55%). On price, ratings volume, 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. Data Modeler sells 3 in-app purchases, starting at $8.49 per month and MarkChart sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Data Modeler holds the better App Store score, 4.4 against 4.0. Both are backed by a comparable volume of ratings — 5 and 14 respectively. Written reviews complicate that: 55% of Data Modeler's written reviews are positive against 73% of MarkChart's, so the app with the better star average is not the one people write more warmly about.
Data Modeler ships an update every 5 days, MarkChart every 3 weeks. The most recent releases landed on October 11, 2026 and October 15, 2026 respectively.
| Parameter | Data Modeler | MarkChart |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (5 ratings) — better | 4.0 (14 ratings) |
| Positive reviews | 54.5% of reviews | 72.7% of reviews — better |
| Number of ratings | 5 | 14 — better |
| Update frequency | Every 5 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free with in-app purchases |
| Devices | iPhone, iPad, Mac | iPhone, iPad, Mac |
| Requires iOS | 17.6 — better | 18.2 |
| Further details — not scored | ||
| Size | 23 MB | 55 MB |
| Age rating | 4+ | 4+ |
| Developer | Rahul Katariya | Alexandre Colucci |
Customer experience
Data Modeler
MarkChart
In-app purchases
Data Modeler
- Monthly$8.491 Month
- Annual$59.991 Year
- Introductory Lifetime Offer$89.99
MarkChart
- MarkChart Pro$12.99
Questions
Is Data Modeler free?
Is MarkChart free?
Which has better reviews, Data Modeler or MarkChart?
Do Data Modeler or MarkChart have ads?
Which is updated more often, Data Modeler or MarkChart?
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