The home page of the app has a central place to_see_other people’s feedback, but there is no obvious way to actually submit feedback. To get here, I had to click on someone else’s feedback which I wasn’t actually interested in. If feedback is valuable to you, there should be an obvious, visible call-to-action for feedback submission.
There’s the “Support” link in the footer. That does it :)
Yep, both work. They take you to the support forums. Alternatively you can email me: firstname.lastname@example.org (linked to on the About page).