I'm in a similar position, except I'm not trying to get new users. In fact, I'm trying to maintain a very small set of users so I can test ideas on them before

I'm in a similar position, except I'm not trying to get new users. In fact, I'm trying to maintain a very small set of users so I can test ideas on them before I try to go bigger. Getting users is great, but getting traction, meaning users who keep coming back is a much better goal to aim for. So out of your 9 users, start looking at the percentage, although small, that are regularly using your app. I'm up to 83 users with 0 marketing and I'm trying out new ideas, watching the analytic data and responding over and over. It's a great spot to be in. Keep it up.