Important question! I plan to keep the core product free forever because I think it's important in a world of profiteering healthcare. My minimal wish is to make enough to keep it running forever. It costs about $3k a year right now, but I expect I could get these costs down with a couple infra changes. I'm fortunate to have Startup School credits covering a large part of it for the next 10 months. I have ideas for a premium plan that will give extra insights, the ability for users to make money by adding their own affiliate links to things they use, and perhaps adding over a certain number of therapies or adding things in certain categories like test results to their stack. I welcome any ideas as well.