Apple has shared the specs needed for accessories that want to take advantage of the U1 chip and nearby interactions.
The documentation includes information for app developers, accessory manufacturers, and chipset makers who want to learn more about how get the best out of the U1 chip.
Enable people to interact with connected accessories in entirely new and exciting ways by leveraging the U1 chip in iPhone or Apple Watch. The nearby interaction framework makes it easy to integrate ultra-broadband (UWB) into apps and hardware accessories.
These specifications allow manufacturers to create accessories that use the U1 chip and the Precision Finding function already seen on AirTag. This could then open the door for real competitors to the Apple tracker, complete with AR functions for nearby search.