# DDchat AI vs Guyun

The clearest difference is in-app purchases: Guyun at none against DDchat AI's 2. Guyun also leads on iOS requirement (17.0 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. DDchat AI sells 2 one-off in-app purchases. Guyun asks for nothing beyond the download.

DDchat AI ships an update every 3 days, Guyun weekly. The most recent releases landed on October 17, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | DDchat AI | Guyun |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ddchat-ai/id6766894679/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 87.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Weekly |
| Monetization | Paid | — |
| Size | 12 MB | 4 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [俊华 乔](https://appshunter.io/developer/1896311102) | [晖 江](https://appshunter.io/developer/6796150562) |

## What reviewers say

### DDchat AI

[App page](https://appshunter.io/ios/app/ddchat-ai/id6766894679)

A native iOS AI chat client offering a polished and fluid user experience. It supports multiple AI models and protocols, with advanced features like visualized chain-of-thought and task-specific assistants. All data remains on your device for enhanced privacy.

**Highlights:** Native iOS feel with fluid animations, Supports Chat Completions and Anthropic protocols, Automatic model capability detection, Visualized chain-of-thought reasoning, Task-specific AI assistants, Inline HTML rendering with Markdown support, Privacy-first, zero data upload

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DDchat Pro Lifetime (Offer) | $1.99 | one-time |
| DDchat Pro Lifetime | $9.99 | one-time |


### Guyun

[App page](https://appshunter.io/ios/app/guyun/id6809848348)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is DDchat AI free?

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

### Is Guyun free?

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

### Do DDchat AI or Guyun have ads?

Neither DDchat AI nor Guyun shows ads.

### Which is updated more often, DDchat AI or Guyun?

DDchat AI ships an update every 3 days, and Guyun weekly. Most recently, DDchat AI was updated on October 17, 2026 and Guyun on October 13, 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.*