I’m happy to share a Kirby extension for STOMT.
STOMT allows you to collect structured feedback from your websites, apps and even games. All the feedback is collected publicly on your STOMT page, where we provide many tools to search, filter, label, manage and manage all the feedback. At the same time you can build up a small community as other people can vote and discuss the feedback.
It has a freemium model (forever free) and offers some premium features for powers users.