# App大学 (旧Flutter大学) vs Simple Sequence Diagram AI

The clearest difference is chart position: Simple Sequence Diagram AI at #200 against App大学 (旧Flutter大学)'s unranked. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. App大学 (旧Flutter大学) sells 5 in-app purchases, starting at $19.99 per month and Simple Sequence Diagram AI sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 16, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | App大学 (旧Flutter大学) | Simple Sequence Diagram AI |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | Freemium | — |
| Best chart rank | — | **#200** |
| Size | 124 MB | 55 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KBOY, LLC.](https://appshunter.io/developer/1121544040) | [YUKI TANAIKE](https://appshunter.io/developer/478558546) |

## What reviewers say

### App大学 (旧Flutter大学)

[App page](https://appshunter.io/ios/app/app-flutter/id1532391360)

This app offers a specialized learning community for mobile app development. It provides various learning plans and community features to help users master app creation.

**Highlights:** Mobile app development focus, Learning community, Specialized learning plans, Community features

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| コミュニティプラン | $19.99 | per month |
| 課題学習プラン | $39.99 | per month |
| AI修行プラン | $69.99 | per month |
| ライト修行プラン | $79.99 | per month |
| Flutter修行プラン | $99.99 | per month |


### Simple Sequence Diagram AI

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

**Currently charting:** #200 Top Grossing · Developer Tools (US App Store)

**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 App大学 (旧Flutter大学) free?

App大学 (旧Flutter大学) is free to download, with in-app purchases available.

### Is Simple Sequence Diagram AI free?

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

### Do App大学 (旧Flutter大学) or Simple Sequence Diagram AI have ads?

Neither App大学 (旧Flutter大学) nor Simple Sequence Diagram AI shows ads.

### Which is updated more often, App大学 (旧Flutter大学) or Simple Sequence Diagram AI?

App大学 (旧Flutter大学) ships an update every 2 weeks, and Simple Sequence Diagram AI every 2 weeks. Most recently, App大学 (旧Flutter大学) was updated on October 16, 2026 and Simple Sequence Diagram AI on October 12, 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.*