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Own a Roku TV or streaming device? You're about to see a lot more ads on your home screen
(www.techradar.com)
This is a most excellent place for technology news and articles.
Directly from the play store, you can install alternative launchers. Some people like FLauncher; I did not. I went with Projectivy. Highly customizable, very clean.
You can also grab a button re-mapper there. I went with tvQuickActions Pro - it's paid, but quite powerful.
For SmartTubeNext, I followed this guide.