CloudStream is a player for the IPTV playlist you already have. Install it free, add your playlist, and watch on your TV, phone or Fire Stick.
Official Android app
Download from Google Play, then add the playlist from your own IPTV provider by URL, Xtream login or QR pairing.
Choose your device and follow the step-by-step setup
Install the official CloudStream TV app with Downloader — full guide with pictures: cloudstream.pro/firestick