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TAG Heuer's Pricey New Smartwatch Ditches Wear OS to Work on Your iPhone

With the Connected Calibre E5, the high-end Swiss brand switches to its own operating system.

 & James Peckham Reporter

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(Credit: Tag Heuer)

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Ten years ago, TAG Heuer introduced its first connected smartwatch, sparking a spate of high-end wearables. Now, its latest variant includes a major change, allowing it to work with iPhones.

TAG Heuer wearables have traditionally run Android Wear and Wear OS, meaning they have had limited iPhone compatibility. Some don't work with Apple's smartphones at all, severely limiting TAG Heuer's potential user base. So, on the new TAG Heuer Connected Calibre E5 smartwatch, the company has switched to its own software for the first time.

TAG Heuer OS is based on Android’s Open Source Project, allowing watches to connect to phones running iOS 18 or later or Android 13 and up. The trade-off is that third-party app support will be more limited than previous TAG Heuer smartwatches, meaning you'll rely more on built-in features.

The TAG Heuer Connected Calibre E5 is available in either a 40mm or 45mm case, with several steel and titanium color options, as well as various strap choices.

The rear of the watch
(Credit: Tag Heuer)

There's also a collaboration with New Balance, featuring a variant designed for runners who prefer a more high-end watch. This comes in black titanium with a blue material strap with the New Balance logo emblazoned near the watch's lugs.

The 40mm comes with a 1.2-inch display with a resolution of 390 by 390, or 326ppi. The larger version has a 1.39-inch screen with a resolution of 454 by 454 and the same 326ppi.

TAG Heuer says the 40mm version will last for around 1.5 days, and it'll recharge in 90 minutes. The 45mm lasts for an estimated three days, and it can recharge in around 30 minutes.

The watch is powered a Qualcomm Snapdragon 5100+, although we don’t know how much RAM is included. Each version comes with GPS, Wi-Fi, and Bluetooth features plus software to answer calls, read notifications, control music, and more.

As with most TAG Heuer products, the price is high. The base 40mm variant costs $1,600 with the top-end model at $2,050. If you want the larger 45mm, it starts at $1,700 with prices increasing to $2,400.

About Our Expert

James Peckham

James Peckham

Reporter

I’ve been a journalist for over a decade after getting my start in tech reporting back in 2013. I joined PCMag in 2025, where I cover the latest developments across the tech sphere, writing about the gadgets and services you use every day. Be sure to send me any tips you think PCMag would be interested in.

I’ve worked at TechRadar, Android Police, T3, and more, where I broke many tech stories you may have read, including the return of the Motorola Razr when it first became a foldable phone. Based near London, I’ve appeared on BBC News, Al Jazeera, and other TV networks, podcasts, and radio shows as an expert on the latest tech stories and trends.

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