You can test Cellin with a blank Google Sheet with link sharing turned on with editor permission for anyone. You'll have to paste the link to the textbox in the top left of the app & click the "Connect" button so that Cellin will be able to open the Google Sheet on its browser. After that, you can try one of the 3 example prompts on the top right or you can ask Cellin to do something by sending it a message from the chat input at the bottom right of the app. I'd love to hear to hear about things it gets wrong, things you wish it could do, any bugs & things you liked. Thank you for checking my project out!
About
Cellin is an AI Agent who has access to its own browser where it's able to help users with Google Sheets related tasks. Going forward the plan is to allow it to be good at helping with more & more web based tools to do knowledge work tasks like a human using those tools would.