OpenCat - Chat with AI bot 17+

Native AI Utilities

Early Moon, LLC

    • 4.3 • 134 Ratings
    • Free
    • Offers In-App Purchases


OpenCat is a native AI client, offering a smoother and faster chat experience than the web.

If you have any question, please contact us at

Terms of Use

What’s New

Version 2.23.0

Support new models

Ratings and Reviews

4.3 out of 5
134 Ratings

134 Ratings

Firwok ,

A Highly Customizable Chatbot Client Powered by ChatGPT API

As a third-party client that utilizes ChatGPT API, OpenCat is undoubtedly a practical and recommendable application. As a user who is interested in conversational bots, I found this application on the App Store and realized it is both user-friendly and highly customizable.

OpenCat enables you to easily integrate with ChatGPT API, powered by natural language processing technology, and launch your own chatbot. You can also customize its domains, entities, intents and other components, making it more suitable for your needs. This is very useful because it allows better control over your bot's behavior and makes it more human-like.

Moreover, I appreciate OpenCat's interface design. Its interface is straightforward, easy to use, and helps you create and manage multiple chatbots with ease. I can effortlessly add my own dialogs to my bot, modify them when needed, and make it more engaging to interact with my users.

In conclusion, I really like OpenCat and I think it is an extremely practical, user-friendly, and highly customizable application. Whether you're interested in conversational bots or you want a customized chatbot to meet your specific needs, I highly recommend using OpenCat.

sleeplesshermit ,

The best ChatGPT app, before OpenAI makes its official one.

Among the many similar apps out there with ChatGPT, this one stands out in particular. With many substantial features, I love the use of Microsoft TTS (text to speech) with 22 choices of US English voices, 15 choices of UK, and other languages, all provided free of charge for normal consumer usage. This breaks away from the iPhone’s rigid synthesized voices , and when used in conjunction with the auto-reading button, OpenCat makes conversing with ChatGPT a more interactive, fluent and fun experience! And I look forward to future releases that will harness ChatGPT’s Whisper API to improve not only reading, but also listening capabilities of iPhone!

Jinjin57456?. ,

Works perfect….on my iPad.

This app is everything thing I was looking for. Worth the price for the features you get. And with my own api key It’s just what I need. Cloud saves between devices is a must for me. Switching between my iPad and iPhone is common place. I only have one issue. It’s present on this current release and a previous version. On my phone (11 Pro Max) typing on the keyboard is very laggy. Like borderline unusable laggy. I can get almost a full word ahead of the app before it registers. On my iPad it’s perfect. So my criticism only applies to the iPhone app. This is the only app I’ve had problems with. Hopefully it gets fixed soon. Other than that, it’s well worth the cost. If you have your own api key.

App Privacy

The developer, Early Moon, LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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