# VNDefExpo vs Simple Sequence Diagram AI

The clearest difference is in-app purchases: VNDefExpo at none against Simple Sequence Diagram AI's 2. VNDefExpo also leads on update cadence (every 6 days vs every 2 weeks) and iOS requirement (13.0 vs 15.6). 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. VNDefExpo asks for nothing beyond the download.

VNDefExpo ships an update every 6 days, Simple Sequence Diagram AI every 2 weeks. Both last shipped on October 27, 2026.

## The numbers

| Metric | VNDefExpo | Simple Sequence Diagram AI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 2 weeks |
| Size | 48 MB | 55 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [VIETTEL BUSINESS SOLUTIONS CORPORATION – BRANCH OF VIETTEL GROUP](https://appshunter.io/developer/953409998) | [YUKI TANAIKE](https://appshunter.io/developer/478558546) |

## What reviewers say

### VNDefExpo

[App page](https://appshunter.io/ios/app/vndefexpo/id6444647090)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is VNDefExpo free?

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

### Is Simple Sequence Diagram AI free?

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

### Do VNDefExpo or Simple Sequence Diagram AI have ads?

Neither VNDefExpo nor Simple Sequence Diagram AI shows ads.

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

VNDefExpo ships an update every 6 days, and Simple Sequence Diagram AI every 2 weeks. Most recently, VNDefExpo was updated on October 27, 2026 and Simple Sequence Diagram AI on October 27, 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.*