The best alternatives to Screeney are Trello, Instabug, and Usersnap. If these 3 options don't work for you, we've listed a few more alternatives below.
Trello is a web-based Kanban-style list-making application. Originally made by Fog Creek Software in 2011, it was spun out to form the basis of a separate company in 2014 and later sold to Atlassian in January 2017.
Instabug empowers mobile teams test new features, improve app quality, and collect actionable feedback from users across the entire mobile development lifecycle