The people who made the app should add the Fenrir cause it is a Fjourdur creature its basically a big direwolf with a freezing ability and cool ice spikes when it happens you tame it like a direwolf tranq and feed it meat
Not only does it retrieve your items if you die (everything - IF it can handle the weight!) but it can fetch bags for you!! On Xbox, double tap Y with the bag in your line of sight and Fjordhawk will retrieve it for you. It will highlight bags with a little icon of a skull and crossbones in a black circle that pulses. Hope that helps. Thanks !!