There are many apps available that can be used as a TV remote. Some popular options include the Peel Smart Remote app and the AnyMote Universal Remote app. To use either of these apps, you will need to first connect your phone to the same Wi-Fi network as your TV. Once you have done this, you should be able to launch the app and follow the on-screen instructions to pair your phone with your TV. Once you have done this, you should be able to use your phone as a remote control for your TV.