The people whose problem the app solves would be organic users. If the app doesn't solve a problem someone has, that's a problem. If you can't find people wit

The people whose problem the app solves would be organic users. If the app doesn't solve a problem someone has, that's a problem. If you can't find people with the problem the app solves, that's also a problem, but a different one. If you built something but aren't sure it solves anyone's problem, that's a third type of problem. Anyway, the best way to get organic users is to talk to people about their actual problems and build something that solves them. Good luck.