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Apple U1
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Apple U1
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| Designer | Apple |
|---|---|
| Introduced | September 2019 (iPhone 11 generation) |
| Role | Ultra-wideband (UWB) — precise spatial awareness |
| Devices | iPhone 11–14 generations · Apple Watch Series 6–8/Ultra (via SiP) · HomePod mini · AirTag |
| Successor | 2nd-generation UWB chip |
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The Apple U1 gave Apple devices a sense of where things are. Introduced quietly in the iPhone 11 generation, its ultra-wideband radio measures distance and direction to other U1 devices with centimeter-class precision — the technology behind AirTag's Precision Finding arrow, directional AirDrop, HomePod mini handoff, and UWB car keys.
1 Legacy✎
The U1 shipped a year before it had anything to point at — classic Apple infrastructure-first silicon, waiting for AirTag. Its spatial-awareness layer became a quiet pillar of the ecosystem and was succeeded in 2023 by the second-generation UWB chip with triple the range.
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