I'm in the same spot with my app (digitaldetachapp.com).

I found an awesome developer overseas, but I'm at a point where I'm not sure how much money I want to put into it. I've decided to slowly keep improving based on customer feedback (I'm self-funding this). It's a great learning experience at the very least.

Here's what I suggest:

1) Fix the bugs and 2.) Consider charging more (I'd probably triple the price if I was you)

It seems like you're delivering quite a bit of value. Don't be afraid to charge more.