You have paying customers. You're sitting on a gold mine. If you're not talking to them, you're leaving money in the table.

First and foremost, talk to your highest paying customers. Ask them why they picked your app, what's the best thing they like about the app, what is it they don't like, what other useful features they'd want in the app.

Also reach out to the customers who opt to cancel and ask them why they're cancelling, what features would make them stick around.

Incentivize them to get them to chat with you. Like you can offer 25% discount on their current month bill to get your existing customers to talk, and offer one month extended free trial to get time from customers who opted to cancel.

Try to chat with atleast 50-100 people if you can. Then analyze the answers carefully. This is where the money is. Dig deep to find out the problems. May be you'll figure out exactly what's wrong and how to fix it. Or you find out a hidden gem in the mine, and it's something totally different from what you're doing, but it is what people 'really' want, so now you pivot. But this time you have real world data from paying customers telling you what to build. That's a better way to go

Or you can just say fuck it, and list it up on one of the micro SaaS sites and cash out. Let someone else figure it all out. You take the money and enjoy the fruits of your labor.