so i made a little tool that generates meal plans based on whatever you have in your fridge. built it with a no-code thing over a few months, its free right now and somehow has like 500 people using it monthly which blew my mind. a bunch of them have emailed asking for more features (saving plans, grocery lists) and id happily build a 5/mo paid version, the problem is i have no idea how to actually do the payment + accounts + "this person paid so unlock the thing" side of it. I've ...