You must be a Samsung-certified technician or registered with Samsung to access the HASS backend and use the app.
The app often requires a HASS Service Module (e.g., model DB81-05903A), which connects your mobile phone to the appliance via USB-C or other specific connectors. how to download samsung hass app
Even if you obtain the APK, the app requires a valid technician login to function. You must be a Samsung-certified technician or registered
If your goal is to download the open-source platform to your Samsung phone or tablet, you are likely looking for the Home Assistant Companion app. How to Download the Home Assistant Companion App: how to download samsung hass app