How to use it
Do this once on your Fire TV, then open the app you just installed.
1
Unlock Developer Options
Settings → My Fire TV → About → click your device's name 7 times.
2
Turn on ADB debugging
Settings → My Fire TV → Developer Options → turn on "ADB debugging".
3
Find your Fire TV's IP address
Settings → My Fire TV → About → Network. Note the IP shown, e.g. 192.168.1.42.
4
Open the installed app on your phone
Enter that IP address and tap Connect. Accept the prompt on your TV if asked.
Both devices need to be on the same Wi-Fi network. It won't work over mobile data (4G/5G). If your TV never shows a prompt, it may already trust this app from a previous connection — that's normal.