# Data Modeler vs MarkChart

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.

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.

## The numbers

| Metric | Data Modeler | MarkChart |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (5 ratings)](https://appshunter.io/ios/app/data-modeler/id1575153701/reviews)** | [4.0 (14 ratings)](https://appshunter.io/ios/app/markchart-mermaid-editor/id6475648822/reviews) |
| Number of ratings | 5 | **14** |
| Positive reviews | 54.5% of reviews | **72.7% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 3 weeks |
| Monetization | Freemium | Free with in-app purchases |
| Size | 23 MB | 55 MB |
| Requires iOS | **17.6** | 18.2 |
| Devices | iPhone, iPad, Mac | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Rahul Katariya](https://appshunter.io/developer/1680332229) | [Alexandre Colucci](https://appshunter.io/developer/1478787437) |

## What reviewers say

### Data Modeler

[App page](https://appshunter.io/ios/app/data-modeler/id1575153701)

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.

**Highlights:** 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

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $8.49 | per month |
| Annual | $59.99 | per year |
| Introductory Lifetime Offer | $89.99 | one-time |


### MarkChart

[App page](https://appshunter.io/ios/app/markchart-mermaid-editor/id6475648822)

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.

**Highlights:** Mermaid diagram editing, Real-time preview, Built-in templates, Automatic updates, Export to PDF, PNG, SVG, Syntax highlighting, Dark Mode support

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MarkChart Pro | $12.99 | one-time |


## Frequently asked questions

### Is Data Modeler free?

Data Modeler is free to download, with in-app purchases available.

### Is MarkChart free?

MarkChart is free to download, with in-app purchases available.

### Which has better reviews, Data Modeler or MarkChart?

Data Modeler is rated higher. Data Modeler averages 4.4 out of 5 from 5 ratings, while MarkChart averages 4.0 from 14 ratings.

### Do Data Modeler or MarkChart have ads?

Neither Data Modeler nor MarkChart shows ads.

### Which is updated more often, Data Modeler or MarkChart?

Data Modeler ships an update every 5 days, and MarkChart every 3 weeks. Most recently, Data Modeler was updated on October 11, 2026 and MarkChart on October 15, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*