First, follow the below guide to enable Unknown Source, and then we will move towards the installation section:1. Close all the apps and from Home Screen hovers to the above menu, and then click on Settings. 2. After this you need to move forward to see more options and from here select My FireTV. 3. At this time just scroll down and then open Developer Options. 4. Here you will see two more options and from there click on Apps from Unknown Source. 5. Right after clicking on that feature it will show a warning message just ignore it and click Turn on. Now the installation of Unknown Source is enabled which means we can now sideload IPTV Smarters on FireTV Stick. So, without wasting any more time let’s head to the installation guide that is given below and make sure to read the steps twice before following. In this guide, we will use an app called Downloader that is available on the App Store. Launch Firestick and from Home Screen hover to the above menu and then click Search or Magnifying Glass icon. Now from here using the virtual keyboard type Downloader or else use Alexa Voice assistant by pressing the mic button on Remote. Open the first result having an orange background (else check the screenshot attached below). At this time you need to click on Download (You Own it) button. Now just wait for a while until your apps start downloading and when it’s done you will see Open. When that button appears just click on it to launch Downloader on your device. When launching the Downloader for the first time you will be asked to allow permission to Access Media, Files, Photos, etc then click on the Allow button. After this you will see the box appears where it requires to type an address for the app to download. Hover to box and click select to launch keyboard and then type https://firesticklab.com/smarters.apk and then click Go
You can also use it without https://, for example, firesticklab.com/smarters.apk but if this doesn’t work then use https:// prefix as well.