Apple had released the fourth generation Apple TV few months ago and as soon as it was launched, people wanted the Remote App to be able to completely replace the new Siri Remote.
Apple had launched the beta version of the new Apple TV Remote App during WWDC and it has finally be released for public use. The new Apple TV Remote App is compatible with the older generation devices.
Currently the App does not seem to support the full resolution in Ipad whereas the old App was available for Ipad too. There is also an Apple watch support available if you want to control the Apple TV from the Apple Watch.