If you use FireStreams on a Stalker/portal login, choose STB Emulator. If you have M3U or Xtream Codes, choose IPTV Smarters Pro or TiviMate.
STB Emulator
Built to emulate MAG boxes. Lightweight, stable, ideal for portal IPTV on Fire Stick and Android.
IPTV Smarters Pro
Better for multi-playlist setups and iOS, with a modern UI and Xtream support.