Smartlet One – Modular strap for watch & smartwatch

Smartlet One is the first patented modular strap that lets you wear your mechanical watch and your smartwatch on the same wrist. Your heritage timepiece stays in the spotlight, while your smartwatch or fitness tracker works seamlessly, just below.

Designed and made in Paris to watchmaking tolerances, Smartlet One sets up in 30 seconds — no tools, no modification to your watches. Its patented system was awarded at Concours Lépine 2025 and selected for CES 2026.

Three finishes, one signature:

• Classic — hand-brushed SS316L surgical-grade stainless steel. Everyday elegance.
• Shadow — sandblasted black SS316L steel, matte finish. Quiet strength, refined discretion.
• Titanium — brushed satin grey Grade 2 titanium. Exceptional lightness, stronger than steel.

Choose your smartwatch or tracker — tell us your device (or your 18–24 mm lug width) and we include the matching connector.

Key features

• Two watches, zero compromise — your heritage timepiece and your connected life, together.
• 30-second setup — no tools, no damage, fully reversible.
• Universal compatibility — fits any watch with an 18 mm to 24 mm lug width. Compatible with leading smartwatches and trackers (Apple Watch, Samsung Galaxy Watch, Garmin, Polar, Whoop, Fitbit…).
• 2-year warranty — watchmaking tolerances, water-resistant, built for daily wear.

Watches, smartwatches and fitness trackers are not included. Please check your watch's compatibility before ordering.