X-haven Assistant is an unofficial helper app designed for the popular boardgames Gloomhaven, Frosthaven, and any derivative games. Developed by Hans Moeller, this app aims to provide a replacement for the no longer available Gloomhaven Helper by Esoteric Software.

The main focus of X-haven Assistant is to deliver a seamless user experience, resembling a physical boardgame component rather than a typical material style app. This approach is reflected in the app's design, with most of the functionality consolidated into a single screen. While this may initially appear busy, it is a deliberate choice to minimize the need for user input, ultimately enhancing the overall user experience for boardgame enthusiasts.