# Chat AI vs 長信吉

The clearest difference is in-app purchases: 長信吉 at none against Chat AI's 3. Chat AI's advantage is iOS requirement (15.6 vs 18). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Chat AI sells 3 in-app purchases, starting at $3.99 per 7 days. 長信吉 asks for nothing beyond the download.

Chat AI ships an update every 2 weeks, 長信吉 every 8 days. The most recent releases landed on October 24, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Chat AI | 長信吉 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.6 (8 ratings)](https://appshunter.io/ios/app/chat-ai-chatbot-and-assistant/id1672248522/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 97.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 2 weeks | **Every 8 days** |
| Monetization | Free with in-app purchases | — |
| Size | 54 MB | 23 MB |
| Requires iOS | **15.6** | 18 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ParticleThink Technology Co., Ltd.](https://appshunter.io/developer/1630886372) | [Cheng Lun Hung](https://appshunter.io/developer/1501635683) |

## What reviewers say

### Chat AI

[App page](https://appshunter.io/ios/app/chat-ai-chatbot-and-assistant/id1672248522)

This AI-powered application assists with a wide range of tasks, from answering complex questions and writing essays to acting as a personal secretary or coding assistant. It leverages the 3.5-turbo model to provide human-like responses and offers pre-prepared prompts for various topics.

**Highlights:** AI-powered assistance, Essay writing, Coding help, Personal secretary functions, Knowledge encyclopedia, Email drafting, Travel advice

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AI Premium | $3.99 | per 7 days |
| AI Premium | $9.99 | per month |
| AI Premium | $29.99 | per year |


### 長信吉

[App page](https://appshunter.io/ios/app/id6468866754)

**In-app purchases:** none


## Frequently asked questions

### Is Chat AI free?

Chat AI is free to download, with in-app purchases available.

### Is 長信吉 free?

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

### Do Chat AI or 長信吉 have ads?

Both Chat AI and 長信吉 show ads.

### Which is updated more often, Chat AI or 長信吉?

Chat AI ships an update every 2 weeks, and 長信吉 every 8 days. Most recently, Chat AI was updated on October 24, 2026 and 長信吉 on October 7, 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.*