[sharemywin]

I would send an email to your users with a survey asking, how they like it, whats most important to them, what they want fixed, as well as how much they would be willing to pay for it. And if they don't want to pay for it maybe ask what you could add or fix that would make them want to pay for it. Let the users decide its fate.

[eb0la]

Maybe something like this could help: Use the app for free (at least by now). If you want something done (new features, integrations...), vote for it. If you need it badly pay for getting more votes.

The good part of the voting is that users become citizens of the community around your app.

Maybe it helps retaining users and making some paying customers.

[kristaps1990]

Will do that! Thanks for advice!