The Apple TV Remote app for iPhone is out now

Apple has released the Apple TV’s companion iPhone remote app. It’s a full-fledged (albeit less convenient) replacement for the remote that came with every black Apple TV, or generations two, three, and four.
The app lets users control their Apple TV with touch gestures; use the iPhone’s keyboard to enter email addresses, passwords, or other text; play, pause, fast forward, or rewind currently playing videos or songs; and, for owners of the latest-generation Apple TV, ask Siri