Maison Smartlet designs and engineers a patented modular watch strap, right in the center of Paris. It lets you wear a mechanical watch and a smartwatch on the same wrist: the mechanical watch on top, the connected device underneath, discreet and always active.

No tools. No modification to the watch. The system replaces the traditional spring bar with a patented locking system that seat directly into the lug holes you already use. Smartlet covers lug widths from 18 to 24mm, the widest range on the market, which makes it compatible with over 100 watch brands from Rolex and Omega to Seiko, and with Apple Watch, Samsung Galaxy Watch, Garmin, Whoop, Fitbit and Google Pixel Watch.

Our first collection, Smartlet One exists in three watchmaker finishes: Classic in hand-brushed SS316L steel, Shadow in matte sandblasted black PVD, and Titanium in satin Grade 2 titanium.

The brand was founded by David Ohayon, a CentraleSupelec/ INSEAD executive and lifelong watch collector who refused to choose between his watches and his health data. Smartlet was awarded at Concours Lepine Paris 2025, selected for CES 2026 in Las Vegas and received the UBH Special Jury Prize in June 2026.