What are you developing?

Probably the next $2T startup, so we are are all curious to know what that is :) Even small personal projects are welcome. Let me know also what model you use and how much you spend in a month. I’m developing a focus room that I can share with a few friends and we can incentivize each other to study/work but at the same time chat when we are having a break. Nothing fancy, and probably it already exists haha (let me know if so).