# Simple Sequence Diagram AI vs One Ship Army

The clearest difference is update cadence: One Ship Army at every 4 days against Simple Sequence Diagram AI's every 2 weeks. Simple Sequence Diagram AI's advantage is iOS requirement (15.6 vs 17.6). On price, ads, in-app purchases 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 and One Ship Army sells 1 in-app purchase, starting at $4.99 per year. Whichever you choose, the download price is not the number that matters.

Simple Sequence Diagram AI ships an update every 2 weeks, One Ship Army every 4 days. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Simple Sequence Diagram AI | One Ship Army |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 4 days** |
| Size | 55 MB | 2 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [YUKI TANAIKE](https://appshunter.io/developer/478558546) | [Hammer of the Gods Software](https://appshunter.io/developer/1450705155) |

## 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 |


### One Ship Army

[App page](https://appshunter.io/ios/app/one-ship-army/id6759236676)

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One Ship Army - Full Version | $4.99 | per year |


## Frequently asked questions

### Is Simple Sequence Diagram AI free?

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

### Is One Ship Army free?

One Ship Army is free to download, with in-app purchases available.

### Do Simple Sequence Diagram AI or One Ship Army have ads?

Neither Simple Sequence Diagram AI nor One Ship Army shows ads.

### Which is updated more often, Simple Sequence Diagram AI or One Ship Army?

Simple Sequence Diagram AI ships an update every 2 weeks, and One Ship Army every 4 days. Most recently, Simple Sequence Diagram AI was updated on October 27, 2026 and One Ship Army 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.*