What makes this one of the best universal remote apps for smart TVs is that your remote will actually change, depending on what kind of smart TV you have. Then enter a pairing code that appears on your TV, and a remote will appear on your smartphone. All you have to do is download the app and scan your network for any connected smart TVs on the same WiFi network. With the Universal Remote TV Smart app, you can set up remotes for all your smart TVs.