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Right as Google's Wear OS is hitting its stride —now feature-rich with robust smartwatches that can go toe-to-toe with the Apple Watch—luxury watchmaker TAG Heuer has decided to ditch the operating system altogether for its latest Connected Calibre E5 smartwatch. Instead, it runs a proprietary “TAG Heuer OS” (still based on Android). But unlike many of the latest Wear OS smartwatches designed only for Android phones , this one is compatible with iPhones .

That's likely one of the biggest reasons for the switch, as Google seems to have abandoned making its smartwatch platform compatible

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