# JSON Data Generator vs Data Modeler

The clearest difference is price: Data Modeler at Free against JSON Data Generator's $0.99. Data Modeler also leads on update cadence (every 5 days vs every 37 months). JSON Data Generator's advantage is in-app purchases (none vs 3) and iOS requirement (15.6 vs 17.6). On ads and device support there is nothing between them.

Data Modeler is free to download; JSON Data Generator costs $0.99 up front. Data Modeler sells 3 in-app purchases, starting at $8.49 per month. JSON Data Generator asks for nothing beyond the download.

JSON Data Generator ships an update every 37 months, Data Modeler every 5 days. The most recent releases landed on October 25, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | JSON Data Generator | Data Modeler |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[4.4 (5 ratings)](https://appshunter.io/ios/app/data-modeler/id1575153701/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 54.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 37 months | **Every 5 days** |
| Monetization | — | Freemium |
| Size | 1 MB | 23 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | iPad, Mac | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Konstantin Adamov](https://appshunter.io/developer/1082896610) | [Rahul Katariya](https://appshunter.io/developer/1680332229) |

## What reviewers say

### JSON Data Generator

[App page](https://appshunter.io/ios/app/json-data-generator/id1519924117)

**Features:** Vision Pro support

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is JSON Data Generator free?

JSON Data Generator costs $0.99, with no in-app purchases.

### Is Data Modeler free?

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

### Do JSON Data Generator or Data Modeler have ads?

Neither JSON Data Generator nor Data Modeler shows ads.

### Which is updated more often, JSON Data Generator or Data Modeler?

JSON Data Generator ships an update every 37 months, and Data Modeler every 5 days. Most recently, JSON Data Generator was updated on October 25, 2026 and Data Modeler on October 11, 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.*