# ER Diagram AI vs Schema Studio

The clearest difference is price: ER Diagram AI at Free against Schema Studio's $0.99. ER Diagram AI also leads on update cadence (fortnightly vs every 6 weeks) and iOS requirement (15.6 vs 17.0). Schema Studio's advantage is in-app purchases (none vs 2). On ads and device support there is nothing between them.

ER Diagram AI is free to download; Schema Studio costs $0.99 up front. ER Diagram AI sells 2 in-app purchases, starting at $4.99 per month. Schema Studio asks for nothing beyond the download.

ER Diagram AI ships an update fortnightly, Schema Studio every 6 weeks. The most recent releases landed on October 17, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | ER Diagram AI | Schema Studio |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/er-diagram-ai/id6711352942/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 6 weeks |
| Monetization | Freemium | — |
| Size | 56 MB | 5 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | +4 |
| Developer | [YUKI TANAIKE](https://appshunter.io/developer/478558546) | [SMART BIT K.K](https://appshunter.io/developer/1896559487) |

## What reviewers say

### ER Diagram AI

[App page](https://appshunter.io/ios/app/er-diagram-ai/id6711352942)

Design and visualize database schemas effortlessly with AI assistance. Quickly generate schemas from outlines, make detailed adjustments, and convert diagrams to SQL for various databases. Ideal for new development, reviews, collaboration, and learning.

**Highlights:** AI-assisted schema generation, Automatic SQL conversion, Intuitive editing, Multi-device support via Google Drive, Export and share diagrams, Text-based editing with Mermaid notation, Dark theme support

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Simple ER Pro Version (Monthly) | $4.99 | per month |
| Simple ER Pro Version (Annual) | $44.99 | per year |


### Schema Studio

[App page](https://appshunter.io/ios/app/schema-studio-database-design/id6802662567)

**In-app purchases:** none


## Frequently asked questions

### Is ER Diagram AI free?

ER Diagram AI is free to download, with in-app purchases available.

### Is Schema Studio free?

Schema Studio costs $0.99, with no in-app purchases.

### Do ER Diagram AI or Schema Studio have ads?

Neither ER Diagram AI nor Schema Studio shows ads.

### Which is updated more often, ER Diagram AI or Schema Studio?

ER Diagram AI ships an update fortnightly, and Schema Studio every 6 weeks. Most recently, ER Diagram AI was updated on October 17, 2026 and Schema Studio on October 22, 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.*