# OpenCat vs Diting 谛听

The clearest difference is update cadence: Diting 谛听 at every 2 days against OpenCat's weekly. Diting 谛听 also leads on iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. OpenCat sells 4 in-app purchases, starting at $3.99 per month and Diting 谛听 sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

OpenCat ships an update weekly, Diting 谛听 every 2 days. The most recent releases landed on October 25, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | OpenCat | Diting 谛听 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (851 ratings)](https://appshunter.io/ios/app/opencat-ai-chat-agent-mcp/id6445999201/reviews)** | — |
| Number of ratings | **851** | — |
| Positive reviews | 64.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 96 MB | 27 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Early Moon, LLC](https://appshunter.io/developer/1119881923) | [AU GUIDE PTY LTD](https://appshunter.io/developer/1884765134) |

## What reviewers say

### OpenCat

[App page](https://appshunter.io/ios/app/opencat-ai-chat-agent-mcp/id6445999201)

This AI utility tool offers seamless integration of advanced AI models into your daily routine on Mac, iPhone, and iPad. It features a user-friendly interface, keyboard extensions for in-app AI access, and Siri/shortcut integration for automation. Supports a wide range of popular AI models and offers team deployment options.

**Highlights:** Support for latest popular AI models, Keyboard extensions for in-app AI, Realistic voice synthesis, Siri and shortcut integration, Team deployment with Docker, Customizable AI parameters, Markdown content rendering

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cloud AI | $3.99 | per month |
| Cloud AI | $24.99 | per year |
| Tokens Package | $5.99 | one-time |
| OpenCat Pro | $9.99 | one-time |

**What reviewers like**

- 🚀 Fast and responsive
- 👍 Convenient and user-friendly
- 💡 Customizable API integrations
- 🌐 Syncs across devices
- 🎨 Clean and visually appealing design

**What reviewers complain about**

- 🐛 Bugs and performance issues
- 🔒 Lack of custom API support
- 💻 Compatibility issues with older devices/OSes
- 🗂️ Difficulty managing conversations
- 📤 Inability to export chat data

**Reported bugs**

- Streaming response disruptions
- Disappearing API key input fields
- Inconsistent Markdown rendering
- Keyboard extension not working as expected
- Sync issues between devices

**Requested features**

- Support for more AI models (e.g., Ollama, Groq)
- Markdown rendering for chat responses
- Ability to upload images and files
- Customizable keyboard extensions
- Background task support for long-running queries


### Diting 谛听

[App page](https://appshunter.io/ios/app/diting/id6805868337)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Diting Pro | $9.99 | per month |
| Diting Pro Annual | $79.99 | per year |


## Frequently asked questions

### Is OpenCat free?

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

### Is Diting 谛听 free?

Diting 谛听 is free to download, with in-app purchases available.

### Do OpenCat or Diting 谛听 have ads?

Neither OpenCat nor Diting 谛听 shows ads.

### Which is updated more often, OpenCat or Diting 谛听?

OpenCat ships an update weekly, and Diting 谛听 every 2 days. Most recently, OpenCat was updated on October 25, 2026 and Diting 谛听 on October 11, 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.*