Reviews of OpenCat - AI Chat, Agent, MCP

By: Early Moon, LLC App

List of user reviews and ratings for OpenCat - AI Chat, Agent, MCP

Total ratings

4.60 (Rating count: 837)

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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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User Reviews

Recent rating average: 2.90

All time rating average: 4.60

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33% (17)

Date	Author	Comment
2026-06-16	He*****	Every model returns does not support streaming now
Every model returns does not support streaming now
2026-06-09	As*****	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！
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！
2026-03-15	iZ*****	越做越差，Azure TTS功能至今没有解决。失望至极！！！
越做越差，Azure TTS功能至今没有解决。失望至极！！！
2026-03-13	风为*****	ai对话几次后，回答会混乱，回答的是之前的代码
ai对话几次后，回答会混乱，回答的是之前的代码
2026-03-02	大猫*****	新版本如何让模型进行联网搜索？
新版本如何让模型进行联网搜索？
2026-01-28	ma*****	Please add Vietnamese to the translation section.
Please add Vietnamese to the translation section.
2026-01-23	🤔*****	希望增加修改历史记录的功能，至少可以最后一次的对话内容。有时候模型输出不是希望的格式，目前只能一直删除一直生成直到命中，如果能修改会很方便。
希望增加修改历史记录的功能，至少可以最后一次的对话内容。有时候模型输出不是希望的格式，目前只能一直删除一直生成直到命中，如果能修改会很方便。
2026-01-05	Da*****	My Gemini API is only used for some translation work, and shortly after using OpenCAT, it prompted that the limit had been exceeded.
My Gemini API is only used for some translation work, and shortly after using OpenCAT, it prompted that the limit had been exceeded.
2025-12-09	2s*****	直接一个垃圾，越来越垃圾
直接一个垃圾，越来越垃圾
2025-12-04	爱o*****	一直在用，非常好用。更新模型也很及时。不过因为用的多，积累了很多对话内容。希望增加导出的功能，便于搜索特定内容。
一直在用，非常好用。更新模型也很及时。不过因为用的多，积累了很多对话内容。希望增加导出的功能，便于搜索特定内容。