The official HDHomeRun app does not currently work on the 2026 model of Fire TV sticks, or the 2025 “SELECT” version of the Fire TV stick.
SiliconDust is working on creating a version of the HDHomeRun app for these new “Vega”-based Fire TV devices, but we currently don't have an ETA on when that work will be done.
Fire TV devices that still run “Fire OS” (based on Android) are still fully supported.
Optional: Add the HDHomeRun app to the home screen
The HDHomeRun will attempt to automatically scan for channels the first time it is connected to power, and will occasionally do a background scan every few days, but you may still need to run an initial channel scan.
The majority of Fire TV devices run an OS based on Android called Fire OS. The Fire TV Stick 4K that ends with “Select” in its name is a new and runs a different OS, and as such, the current official HDHomeRun app (and many other streaming apps) is not compatible with it.