# OpenCat - AI Chat, Agent, MCP

> Privacy-First Multi-Model AI

Canonical page: [https://chrome-stats.com/d/id6445999201](https://chrome-stats.com/d/id6445999201)

## Overview

- **ID:** `id6445999201`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Early Moon, LLC
- **Category:** Productivity
- **Rating:** 4.60 / 5 (842 ratings)
- **Version:** 26.9.3
- **Last updated:** 2026-09-18
- **First published:** 2023-03-03
- **Size:** 96 MB
- **Data as of:** 2026-09-19
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/opencat-ai-chat-agent-mcp/id6445999201)
- **Website:** [https://opencat.app](https://opencat.app/)
- **Privacy policy:** [https://opencat.app/privacy](https://opencat.app/privacy)

## Description

OpenCat AI is a privacy-first, multi-model AI assistant that brings AI into every workflow: chat, writing, translation, and search. It supports multiple model options (local models, API Key, Cloud subscription, and Apple Intelligence), MCP and tool calls, web search on OpenCat Cloud, system-wide translation, and rich content rendering (LaTeX, Markdown, and code highlighting). It’s cross‑platform for Mac, iPhone, and iPad, with data stored locally and synced across devices via iCloud.

Pro features unlock deeper integration: an AI Keyboard to polish or reply inside any app, access to all major models through OpenCat Cloud, BYOK with your own API Key (25+ providers), and support for system models and Apple Foundation Models. Local models run offline with Apple silicon acceleration, ensuring private, on‑device inference with no sign‑in and zero configuration for many setups.

## Rankings

- #59,250 — Overall
- #4 — openai chat
- #8 — agent
- #24 — quillbot
- #33 — openai
- #37 — ai summarizer plugin

## Review summary

Users praise OpenCat for cross‑device sync, flexible backends (own API keys or cloud), and support for self‑hosted LLMs with a clean UI. However, repeated issues include inability to customize the server URL, flaky local model support after updates, poor export/copy options and limited documentation, plus UI lag and incomplete features (MCP, search). Overall sentiment is mixed: strong feature set but significant stability and usability drawbacks.

### Pros

- Cross‑device history sync: Chat histories can be continued across iOS and macOS devices.
- Flexible backend: use your own API keys or the cloud service.
- Self‑hosted/local LLM support: can point the app to your own server for faster, private runs.
- Wide model coverage with a clean, efficient UI.

### Cons

- Inability to customize the server URL is repeatedly cited as a major limitation.
- Local/self-hosted model support is inconsistent or disabled after updates; only cloud models selectable in some versions.
- No export/save options for conversations and poor copy/export workflow; lack of documentation.
- UI performance issues: lag when long inputs, chat window shakes with long outputs, occasional unresponsiveness and sync problems.
- Incomplete feature set: MCP support/streaming and search options are not fully implemented or configurable; some features appear unfinished.

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6445999201)