ER Diagram AI vs Schema Studio
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ER Diagram AI
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.
- 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
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Database design is crucial for developing apps and web services. However, designing and visualizing a schema can be time-consuming and complex. With this app, developers can design DB schemas effortlessly. Even with a rough outline, the app can automatically build the schema, and more detailed adjustments can also be made as needed. It is used in various situations such as: - New app development: Creating database schemas for new projects. - Reviewing existing database structures: Visualizing and improving existing DB designs. - Team collaboration: Sharing database designs among team members for efficient collaboration. - Client presentations: Proposing and explaining database designs to clients visually. - Learning: Helping new engineers get familiar with database design. - Quick prototyping: Quickly creating schemas for short-term projects. Please try it out whenever you need to design a database schema. [Features] - Intuitive operability Ease of use is the most important factor. It runs smoothly, and you can intuitively edit your maps. - Automatic SQL Conversion Automatically convert ER diagrams into SQL code. Supported databases include MySQL, PostgreSQL, Oracle, and SQLite. - Ready to use You can use it immediately without registering an account. - Multi-device support It supports cloud storage integration, allowing seamless editing across multiple devices. - Export and Share You can export and share your ER Diagram, and even edit them on a PC. - Import Exported files can be imported and edited. - Text-based editing Edit your ER Diagram directly using Mermaid notation. - Dark theme support Since it supports a dark theme, it is also ideal for use at night.
Schema Studio
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Build tables, see their relationships, and export DDL and documentation. Schema Studio brings database design to iPhone and iPad. • Copy an existing table as the starting point for a new one. Fields, constraints, and indexes carry over; edit the name before saving. • Sort your table list by creation order, table name, or display name, with ascending and descending options. • Set data types, required fields, primary keys, uniqueness, and automatic numbering. • Design composite indexes with per-column sort directions. • Create relationships and inspect an interactive ER diagram. • Review generated SQL in a syntax-highlighted preview. • Save or share SQL plus Excel, PDF, Markdown, and HTML documentation. Generate for PostgreSQL, MySQL, MariaDB, SQLite, Oracle Database, Microsoft SQL Server, and IBM Db2. Choose the interface and documentation languages independently from 15 supported languages. No account, ads, tracking, or cloud service is required. Designs stay on your device unless you explicitly save or share exported files. Table copies do not include relationships. Schema Studio is a design and DDL generation tool; it does not connect to database servers or execute SQL.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | ER Diagram AI | Schema Studio |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Fortnightly — better | Every 6 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 56 MB | 5 MB |
| Age rating | 4+ | +4 |
| Developer | YUKI TANAIKE | SMART BIT K.K |
In-app purchases
ER Diagram AI
- Simple ER Pro Version (Monthly)$4.991 Month
- Simple ER Pro Version (Annual)$44.991 Year
Schema Studio
No in-app purchases
Questions
Is ER Diagram AI free?
Is Schema Studio free?
Do ER Diagram AI or Schema Studio have ads?
Which is updated more often, ER Diagram AI or Schema Studio?
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