Hi,
I completely understand how you're feeling. A friend of mine and I created a website that brought in nice profits for a while, but the busier we got the less time we had to work on it, and the profits started going down. We hated the fact that the website had such potential that wasn't being utilized fully.
I'm happy to see if I can help and won't charge for an initial introduction call (https://clarity.fm/assafben-david/probable653). I've always been pretty good at monetizing existing businesses, so I see this as a nice challenge. Of course, I would need to know more about the app.
Good luck and well done for creating something that generates a profit - this in itself isn't always an easy feat.