# Simple Sequence Diagram AI vs ラダー図ノート

The clearest difference is in-app purchases: ラダー図ノート at none against Simple Sequence Diagram AI's 2. Simple Sequence Diagram AI's advantage is device support (4 vs 2) and iOS requirement (15.6 vs 17.0). On price, update cadence and ads 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. ラダー図ノート asks for nothing beyond the download.

Simple Sequence Diagram AI ships an update every 2 weeks, ラダー図ノート every 9 days. The most recent releases landed on November 8, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Simple Sequence Diagram AI | ラダー図ノート |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 9 days** |
| Size | 55 MB | 4 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [YUKI TANAIKE](https://appshunter.io/developer/478558546) | [Yuya Tanaka](https://appshunter.io/developer/1895106450) |

## What reviewers say

### Simple Sequence Diagram AI

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

**Features:** 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 |


### ラダー図ノート

[App page](https://appshunter.io/ios/app/id6802032636)

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

**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 ラダー図ノート free?

ラダー図ノート is free to download, with no in-app purchases.

### Do Simple Sequence Diagram AI or ラダー図ノート have ads?

Neither Simple Sequence Diagram AI nor ラダー図ノート shows ads.

### Which is updated more often, Simple Sequence Diagram AI or ラダー図ノート?

Simple Sequence Diagram AI ships an update every 2 weeks, and ラダー図ノート every 9 days. Most recently, Simple Sequence Diagram AI was updated on November 8, 2026 and ラダー図ノート on November 6, 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.*