Installing IPTV Smarters is as easy as installing any other app. It requires that you first subscribe to a premium IPTV service at https://apkgenk.com/iptv-smarters-pro/. Once you've logged in, you'll have to accept the license agreement and log in using your username and password. You can usually find this information in your premium IPTV service's account settings. Once you've done that, you're ready to install IPTV Smarters Pro.
The IPTV Smarters app is not available on the Amazon App Store, so you'll need to sideload the application onto your Firestick. To do this, turn on your Firestick-connected TV and navigate to the Find tab. Choose "Search," and search for the Downloader app. Once you've installed Downloader, you can head over to your Firestick settings and choose Developer Options. Then, choose "Install Unknown Apps" to download IPTV Smarters.