19 December, 2025
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The Tag Heuer Connected Calibre E5 is a striking blend of technology and luxury, poised to attract buyers who seek more than the conventional smartwatch experience. However, whether it succeeds in this ambition is a complex question. While the watch boasts an impressive design and comfort, certain technological aspects may deter a quick recommendation. Here’s an in-depth look at the Calibre E5.

Specifications, Price, and Availability

The Tag Heuer Connected Calibre E5 is available in two case sizes — 45mm and 40mm — and comes in various finishes. The model featured in our review is a 45mm titanium version with a black DLC finish, paired with a rubber strap and a steel DLC-coated folding clasp. Additionally, the case is available in steel or rose gold PVD, with options for metal, leather, and fabric straps. Special editions include collaborations with sports brand New Balance and a dedicated Tag Heuer Golf edition.

Pricing varies significantly based on the model. The entry-level 40mm steel smartwatch with a rubber strap is priced at $1,600, while the Golf special edition tops the range at $2,400. The model reviewed here is priced at $2,300. These prices are considerably higher than most other smartwatches, such as the Samsung Galaxy Watch 8, which starts at $349, and the Apple Watch Series 11, starting at $399.

Wearing the Tag Heuer Connected Calibre E5

Fantastic on the Wrist

The Tag Heuer Connected Calibre E5 lives up to the brand’s storied history, dating back to 1860, by offering an exceptional wearing experience. Despite its larger 45mm size, the watch is well-balanced, and the strap is notably comfortable. The folding clasp is easily adjustable, although it can become warm during exercise, the perforations help mitigate sweat.

The 1.39-inch OLED screen is protected by sapphire crystal, reducing reflections and adding a luxurious sheen. The two pushers offer a soft, dampened action, and the rubber-coated crown is easy to rotate. While other smartwatches also feature sapphire crystal screens, the Calibre E5 distinguishes itself with its style and the pride it instills in its wearer. The diverse selection of watch faces, including virtual versions of popular Tag Heuer dials and animated holiday themes, further enhances its appeal.

The Calibre E5 strikes a balance between a luxury analog watch and a smartwatch, more so than competitors like the Galaxy Watch or Pixel Watch. Not everyone may appreciate this blend, but those who do will likely view the Calibre E5 with envy.

Technological Considerations

Apple is the Priority

While the Calibre E5’s design impresses, its technology must match its style. Tag Heuer has opted for an in-house operating system, departing from Google’s Wear OS, and has tailored it for Apple’s iOS. Research indicates that 70% of Tag Heuer’s Connected watch buyers own an iPhone.

Smartwatches compatible with iOS but not made by Apple are rare. The Calibre E5 does not utilize Apple’s Health or Fitness apps, instead relying on the Tag Heuer app for both iOS and Android. Functionally, the experience is similar on both platforms, though the app’s design is notably sleeker on iOS.

Notifications are timely on both systems, and starting and tracking workouts is straightforward. However, notifications are not interactive, necessitating the use of a phone. Connectivity issues, particularly with Android, have been noted, including OS update failures and app disconnections requiring a factory reset. Despite compatibility with both platforms, the Calibre E5 seems better suited for iPhone users.

Software Experience

The Calibre E5’s menu system, navigated via pushers and a touchscreen, is clear but may require adjustment for those accustomed to Wear OS. The Qualcomm Snapdragon 5100+ processor powers the smartwatch, but performance is lacking, with noticeable stutters and slow responses.

Without access to an app store, the software lacks key features like a maps app, despite having built-in GPS. The design is appealing, with clear text and large buttons, but functionality is limited.

Health and Fitness Tracking

Currently, the Calibre E5 does not support sleep tracking or measure blood oxygen levels or heart rate variability (HRV). Tag Heuer promises these features in a future update, but no specific date is provided. Fitness tracking is basic, with data often inconsistent compared to other devices, such as the Oura Ring 4 and Apple Watch Series 11.

Workout tracking menus and screens are visually appealing, but the data’s reliability is questionable. The smartwatch’s battery life is decent, lasting two days with general use, but falls short of expectations for a non-Wear OS device.

Conclusion: A Luxury Choice

The Calibre E5 is positioned as an entry point into Tag Heuer ownership, with quartz models starting at $1,700 and automatic watches at around $3,000. While the smartwatch is enjoyable to wear and visually impressive, its technological shortcomings and high price may deter potential buyers.

Ultimately, the Tag Heuer Connected Calibre E5 is more about the watch than the technology. For those seeking a smartwatch that emphasizes luxury and style, it may be a suitable choice, but for those prioritizing functionality and value, other options may be more appealing.