Surprise Google has released the Android TV Remote App For iOS and it is already available to download.
The app has many features, it has both a d-pad mode, touch mode, and offcourse you can voice search with it.
If you want to search or you need a keyboard to input text now you can it has built-in keyboard.
Now you can Connect multiple remotes and play multiplayer games.
So basically it is your remote for Android TV and with other useful features.