CronusMax is probably overkill for what you want to do - there are more limited adaptors that are more like $20-30.
Brook make a Super Converter specifically for PS4 -> Xbox One (I use their Xbox One -> Wii U one with my Elite controller). I've just looked at their site and there's a new one called Wingman that works with several different types of controller.
Mayflash make the Magic-NS, which can make a variety of controllers appear as each other, including PS4 -> Xbox One.