Lightweight way to gather feature requests from users and let them vote?

To have a user-driven roadmap for my app, I am looking for a tool that let's them suggest and vote on ideas. Something like Canny:

But since I only have a small community, I don't need any crazy features (and to pay $50 each month), I just want people to be able to post ideas and others to vote on it. I expect maybe 20 people at max to use it in the first months.

Or maybe I don't need a tool for that and there's a UX method I'm missing that helps a designer include the user in the roadmap planning from afar?

(Yes I know - testing, interviews, etc. but I'm not gonna run evaluation tests every single month to maybe get a new idea out of it)