the Chitty app logo: A friendly looking robot head.


Chitty is a native MacOS ChatGPT client with a familiar UI. You can chat with the regular ChatGPT assitant, pre‑loaded historic figures, or create your own AI assistant.

Download for freeMacOS 13.1+
A screenshot of the Chitty app.


Frequently asked questions

What's an OpenAI API key? Where do I find it?

Under the hood, Chitty uses ChatGPT, which is a chat AI created by OpenAI. To use ChatGPT, you need an OpenAI API key. You can get one for free by signing up here: After you have signed up, you can see your API key here:

What data are you saving?

The messages you send and assistants you create never pass our servers. All messages are sent directly to OpenAI, and all assistants are stored locally on your device.

What should I be aware of when creating a new assistant?

When you write your prompt for the new assistant, it's a good idea to start with the words: "You are". As an example, the Abraham Lincoln assistant is initialized with the words: "You are Abraham Lincoln, the 16th president of the United States of America."

Why do the assistants sometimes break character?

ChatGPT is a very powerful AI, but it's not comfortable talking about all topics, and it also doesn't want to mislead its users. As a result, it somestimes may break character. We're still trying out to engineer the prompts in a good way, to make the assistants more consistent.


Chitty is committed to protecting the privacy of its users. This Privacy Policy explains how we collect, use, and disclose information about our users when they use our services.

Collection of Personal Information

Chitty does not collect any personal information from its users. We do not require users to create an account, nor do we request any personally identifiable information (e.g., name, email address, phone number) from our users.

Collection of Non-Personal Information

Chitty has access to non-personal information about device types, app-opens, and similar information provided by Apple. None of this information can be traced back to individual users.

Use of the OpenAI API

Chitty sends user messages directly to the OpenAI API to provide its core service. Chitty does not store or retain any such data.

Changes to the Privacy Policy

Chitty reserves the right to modify this Privacy Policy at any time. Any material changes will be communicated to users via our app or website.

Contact Us

If you have any questions or concerns about this Privacy Policy, please contact us at

Made with ♥ by Manuel Thomsen © 2024