Chatterclock is a Chrome extension developed by Josh Staiger that allows users to track the number of messages they have left under their GPT-4 message cap. With OpenAI placing a limit of 50 GPT-4 messages that can be sent every three hours, it can be difficult to keep track of how many messages you have used. The ChatGPT UI does not provide this information, which is where Chatterclock comes in.

This extension provides a convenient solution by keeping track of the number of messages you have used. It displays this information through a badge on the extension icon, making it easily visible. Additionally, Chatterclock also informs you about when you will receive more messages, ensuring that you can effectively manage your usage.

Chatterclock is a free extension that falls under the Browsers category, specifically the Add-ons & Tools subcategory. It is a useful tool for anyone who frequently uses GPT-4 messages and wants to stay within the message cap without any hassle.