Apple U1

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<div style="font: bold 2em/1.2 -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Helvetica Neue', Helvetica, Arial, sans-serif; color: var(--wiki-color);">Apple U1</div>
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! class="ios-lab" | Designer
| class="ios-val" | [[Apple]]
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! class="ios-lab" | Introduced
| class="ios-val" | September 2019 ([[iPhone 11]] generation)
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! class="ios-lab" | Role
| class="ios-val" | Ultra-wideband (UWB) — precise spatial awareness
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! class="ios-lab" | Devices
| class="ios-val" | [[iPhone 11]]–[[iPhone 14|14]] generations · Apple Watch Series 6–8/Ultra (via SiP) · HomePod mini · AirTag
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! class="ios-lab" | Successor
| class="ios-val" | [[Apple U2|2nd-generation UWB chip]]
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{{Apple silicon Navbox}}

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.

= 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 [[Apple U2|second-generation UWB chip]] with triple the range.

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