# OpenCat - AI Chat, Agent, MCP — Privacy-First Multi-Model AI

> Native AI utility tool for Mac, iPhone, and iPad with advanced model support. (iPhone/iPad app by Early Moon, LLC.)

- Source: https://appshunter.io/ios/app/opencat-ai-chat-agent-mcp/id6445999201 (this page in markdown: same URL + `.md`)
- Developer: [Early Moon, LLC](https://appshunter.io/developer/1119881923)
- Category: Productivity, Utilities
- Price: Free with in-app purchases
- Rating: 4.60/5 from 837 App Store ratings · 192 written reviews indexed
- Age rating: 17+
- Requires: iOS 17.0 · 95 MB
- Languages: American English, Dutch, French (France), German (Germany), Japanese, Korean, Brazilian Portuguese, Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan) and 1 more
- Released: 2023-03-03
- Data updated: 2026-08-28
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/opencat-ai-chat-agent-mcp/id6445999201/reviews.md

## What is OpenCat?

Bring AI into every part of your workflow: chat, writing, translation, and search.

· Multiple model options — local models, API Key, Cloud subscription, Apple Intelligence
· MCP — supports MCP and tool calls
· Web search — available on OpenCat Cloud and select providers
· System-wide translation — select text in any app for instant AI translation
· Content rendering — supports LaTeX formulas, Markdown, and code highlighting
· Cross-platform — natively built for Mac, iPhone, and iPad
· Data privacy — stored locally, synced across devices via iCloud

[Pro Features]
· AI Keyboard — invoke AI right in the text field of any app to polish or reply in one step
· OpenCat Cloud subscription provides access to all major models

[A Variety of Models]
· OpenCat Cloud — fast access to leading models
· Local models — one-tap download of open-source models for offline use, accelerated by Apple silicon
· BYOK — use your own API Key, including Coding Plan
· System models — supports Apple Foundation Models

[OpenCat Cloud — Ready to Use, No Setup]
· No sign-up, zero configuration, all major models supported
· 50+ models — ChatGPT, Claude, Gemini, Grok, DeepSeek, GLM, MiniMax, Kimi, Qwen, Doubao, and more, all in one place
· Online search supported

[System-Level AI Translation]
Set OpenCat as your default translation app to translate selected text directly in Safari, Mail, Notes, and any other app. Powered by large language models, translations are natural and fluent — far superior to traditional translation engines.

[Local Models, Offline Inference]
· One-tap download — popular open-source models like Llama, Qwen, and Gemma
· Apple silicon acceleration — built on Apple's official MLX framework, fully leveraging GPU performance for fast, energy-efficient inference
· Fully offline — works without internet, conversation data never leaves your device

[Use Your Own API Key]
· 25+ providers supported — OpenAI, Claude, Gemini, DeepSeek, Kimi, Qwen, Doubao, ERNIE, and more

[Contact Us]
Email: support@dreamoon.ai

Terms of Use
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Privacy Policy & Third-party AI Service Privacy Policy
https://opencat.app/privacy

## Key features

- 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

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Cloud AI | $24.99 | per year |
| Cloud AI | $3.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Tokens Package | $5.99 | one-time |
| OpenCat Pro | $9.99 | one-time |


## What do users think of OpenCat?

Overall sentiment: positive

**Pros**

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

**Cons**

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

**Commonly reported bugs**

- Streaming response disruptions
- Disappearing API key input fields
- Inconsistent Markdown rendering
- Keyboard extension not working as expected
- Sync issues between devices
- Crashes and freezes when handling large inputs

**Most 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
- Prompt library and sharing functionality
- Integration with other productivity apps (e.g., Shortcuts)

## Recent user reviews (10 of 192)

All indexed reviews: https://appshunter.io/ios/app/opencat-ai-chat-agent-mcp/id6445999201/reviews.md

### 5/5 — 支持多媒体模型就爽啦

*2026-08-25*

这个模型用着特别方便，如果他能调用音视频创作的API就简直完美的不要不要啦，不知道开发者老师有没有相关计划。

### 4/5 — Korrektur, 9. August 2026

*2026-08-09*

. Korrektur: am 9. August 2026 gelöscht funktioniert bei mir nicht mehr Abo gekündigt. Ich vermute die Nutzer Grenzen wurden massiv geändert. Ich hätte zwar noch 2 M Token gehabt, nützt mir aber nichts mehr da die Grenzen massiv geändert wurden, gibt mir keine Antwort mehr aus irgendwelchen Gründen auch immer abgerechnet wird trotzdem. 
Da ich die Ursache nicht weiß, nur ein Stern Abzug, musste mir eine andere App zulegen.
Funktioniert noch löschen und Neuinstallation gar nicht mehr. 2M guthaben, die ich noch hatte, sind auch komplett verschwunden. Hab die App wieder gelöscht.
Das mit den automatischen Blocks bei Claude wird erst ab 14. August 2026 eingeführt. Also das dürfte wegfallen, weil der 14. August noch nicht ist.👎

### 5/5 — Love it!

*2026-08-07*

I use the app with OpenRouter (BYOK). It’s very flexible, the developer is responsive and supportive. Also I really like the UI and UX. Thank you!

### 5/5 — 기능 제안

*2026-07-03*

시스템 프롬프트 설정 및 메시지 수정, 재생성 기능이 있으면 좋겠어요!!!

### 1/5 — Broken since the update

*2026-06-16, version 2.93.2*

Every model returns does not support streaming now

### 5/5 — The developer who most actively listens to user suggestions！

*2026-06-09, version 2.93.1*

I emailed the developer suggesting they add a model reasoning effort levels setting, and he quickly implemented this optimization. Now I feel like I can't find a better custom AI assistant than this app！

### 5/5 — Best BYOK

*2026-04-05*

Of all the bring your own key this app feels the best so far

### 1/5 — 越做越差，Azure TTS功能至今没有解决。

*2026-03-15, version 2.89.1*

越做越差，Azure TTS功能至今没有解决。
失望至极！！！

### 5/5 — 对话会混乱

*2026-03-13, version 2.89.0*

ai对话几次后，回答会混乱，回答的是之前的代码

### 1/5 — 越做越差，Azure TTS功能至今没有解决。

*2026-03-06, version 2.89.0*

失望至极！

## Frequently asked questions about OpenCat

### What does OpenCat do?

OpenCat is a native AI utility tool for Mac, iPhone, and iPad that integrates AI into your daily tasks. It supports a wide array of popular AI models, offers keyboard extensions for in-app AI access, and integrates with Siri and shortcuts for automation.

### What are the key features of OpenCat?

Key features include support for numerous popular AI models, keyboard extensions to invoke AI within any app, realistic voice synthesis, Siri and shortcut integration for automation, customizable AI parameters, Markdown rendering, and team deployment options.

### Is OpenCat free to use?

The app is free to download and use, but it offers in-app purchases. This likely means some advanced features, additional model access, or extended usage might require payment.

### What devices is OpenCat compatible with?

OpenCat is natively supported on Mac, iPhone, and iPad, allowing for seamless integration across your Apple ecosystem.

### How can OpenCat be used for team collaboration?

OpenCat supports team deployment via Docker, allowing you to share the AI utility with team members. You can manage users, send invitations, and monitor usage, ensuring data security with private deployment options.

## Version history (last 5 releases)

### 26.8.4 — 2026-08-28

Text-to-speech improvements: added xAI and Gemini voice synthesis. Read Aloud now supports adjustable speed and voice.
Voice input improvements: added gpt-transcribe, Gemini, and grok-stt recognition models, with live word-by-word transcription as you speak.
Image generation improvements: support for the latest GPT, Gemini, and Grok models, with real-time generation progress.
Web search improvements: real-time search progress display and improved source display.
Support for the latest models, including DeepSeek vision models.
Model icons updated to official brand logos.
Fixed multiple UI issues.

### 26.8.3 — 2026-08-25

Improved Translator experience.
Improved Keyboard experience.
Groq now uses the Responses API.
Response generation continues when switching conversations.
Fixed a rendering issue with Markdown tables.

### 26.8.2 — 2026-08-18

Support for the latest DeepSeek and Grok models.
Fixed UI issues

### 26.8.0 — 2026-08-07

DeepSeek API now supports web search.
Improved translations for Simplified Chinese, Traditional Chinese, Japanese, Korean, German, French, Spanish, Portuguese, Dutch, and Vietnamese.
Improved macOS stability by fixing crashes that could be caused by certain screens.

### 26.7.4 — 2026-07-30

Support for uploading PDF and text files.
Grok models now support Web and X search.
Tools now persist their last selected state.
UI and performance improvements.

## Apps similar to OpenCat

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [ChatGPT](https://appshunter.io/ios/app/chatgpt/id6448311069) | 4.8 (9,671,122) | Free | Productivity |
| [flomo浮墨-极简卡片笔记、轻便签与日记备忘](https://appshunter.io/ios/app/flomo/id1552314395) | 4.9 (1,119) | Free | Productivity |
| [Filebar - media player](https://appshunter.io/ios/app/filebar-media-player/id1558391784) | 4.3 (345) | Free | Productivity |
| [MLC Chat](https://appshunter.io/ios/app/mlc-chat/id6448482937) | 4.2 (78) | Free | Productivity |
| [Pal Chat - AI Chat Client](https://appshunter.io/ios/app/pal-chat-ai-chat-client/id6447545085) | 4.3 (417) | Free | Productivity |
| [Cubox: AI Read-It-Later App](https://appshunter.io/ios/app/cubox-ai-read-it-later-app/id1113361350) | 4.4 (237) | Free | Productivity |

## More apps by Early Moon, LLC

- [熊猫吃短信 - 旧版](https://appshunter.io/ios/app/id1319191852)
- [ServerCat - SSH Terminal](https://appshunter.io/ios/app/servercat-ssh-terminal/id1501532023)
- [DAMA - Auto Redact Privacy](https://appshunter.io/ios/app/dama-auto-redact-privacy/id1534690075)
- [DevPal - App Sales Report](https://appshunter.io/ios/app/devpal-app-sales-report/id1534709966)
- [熊猫吃短信2 - 垃圾短信拦截](https://appshunter.io/ios/app/2/id1642682818)

All apps by Early Moon, LLC: https://appshunter.io/developer/1119881923

## Related topics

[agent model](https://appshunter.io/ios/topics/agent-model) · [pal chat](https://appshunter.io/ios/topics/pal-chat) · [rewordit app](https://appshunter.io/ios/topics/rewordit-app) · [agents of change 317](https://appshunter.io/ios/topics/agents-of-change-317) · [pricing ai](https://appshunter.io/ios/topics/pricing-ai) · [open chat](https://appshunter.io/ios/topics/open-chat) · [chatbox](https://appshunter.io/ios/topics/chatbox) · [pal chat ai](https://appshunter.io/ios/topics/pal-chat-ai) · [agent](https://appshunter.io/ios/topics/agent) · [openai api](https://appshunter.io/ios/topics/openai-api) · [multi-ai](https://appshunter.io/ios/topics/multi-ai) · [vladislav kovalskii](https://appshunter.io/ios/topics/vladislav-kovalskii) · [agane](https://appshunter.io/ios/topics/agane) · [penpal ai](https://appshunter.io/ios/topics/penpal-ai)

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-28.*