# Simple Sequence Diagram AI vs UML Mobile

The clearest difference is in-app purchases: UML Mobile at none against Simple Sequence Diagram AI's 2. UML Mobile also leads on iOS requirement (12.0 vs 15.6). Simple Sequence Diagram AI's advantage is update cadence (every 2 weeks vs monthly). On price, ads and device support there is nothing between them.

Both are free to download. Simple Sequence Diagram AI sells 2 in-app purchases, starting at $4.99 per month. UML Mobile asks for nothing beyond the download.

Simple Sequence Diagram AI ships an update every 2 weeks, UML Mobile monthly. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Simple Sequence Diagram AI | UML Mobile |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/uml-mobile/id6747959778/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Monthly |
| Monetization | — | Free |
| Size | 55 MB | 25 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [YUKI TANAIKE](https://appshunter.io/developer/478558546) | [Nilan Patel](https://appshunter.io/developer/1779402639) |

## What reviewers say

### Simple Sequence Diagram AI

[App page](https://appshunter.io/ios/app/simple-sequence-diagram-ai/id6711357061)

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

**In-app purchases (2)**

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


### UML Mobile

[App page](https://appshunter.io/ios/app/uml-mobile/id6747959778)

Instantly transform hand-drawn UML sequence diagrams from notebooks or whiteboards into polished digital visuals. This app uses AI to detect elements and create clean, shareable PNG images, ideal for students and professionals documenting software designs.

**Highlights:** Photo to UML conversion, AI-powered smart detection, Digitize hand-drawn diagrams, Export diagrams as PNG, Ideal for students and professionals

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Simple Sequence Diagram AI free?

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

### Is UML Mobile free?

UML Mobile is free to download, with no in-app purchases.

### Do Simple Sequence Diagram AI or UML Mobile have ads?

Neither Simple Sequence Diagram AI nor UML Mobile shows ads.

### Which is updated more often, Simple Sequence Diagram AI or UML Mobile?

Simple Sequence Diagram AI ships an update every 2 weeks, and UML Mobile monthly. Most recently, Simple Sequence Diagram AI was updated on October 27, 2026 and UML Mobile on October 28, 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.*