Smartwatch Compatibility Guide | Wear Any Smartwatch with Your Watch | Smartlet
Wear any smartwatch
with any mechanical watch
Smartlet One is a modular adapter that clips any smartwatch onto any mechanical watch strap. Compatible with all standard lug widths from 18mm to 24mm. All sensors remain fully operational. No tools, no modifications, fully reversible.
Choose your smartwatch
Select your smartwatch to see the full compatibility guide, model list, and sensor information.
Three steps. No compromise.
Smartlet works with all mechanical watches from 18mm to 24mm lug width, and all smartwatches listed above.
Classic (brushed steel), Shadow (black PVD), or Titanium. Match your mechanical watch case material and aesthetic. No tools required at this stage.
Attach the Smartlet adapter to your watch lugs. The spring-loaded mechanism locks in place with zero metal-to-metal case contact. Fully reversible in seconds.
Insert your smartwatch into the Smartlet module. It locks securely. Both watches now sit on the same wrist. All smartwatch sensors maintain direct skin contact and operate normally.
All compatible smartwatches
Dedicated guides exist for the 13 brands above. The list below covers every other smartwatch brand that works with Smartlet - natively or via adapter. A standard lug width between 18mm and 24mm is all that is required.
Frequently asked
What lug widths does Smartlet support?
Smartlet One natively accommodates any smartwatch band attachment from 18mm to 24mm, with no adapter required. This covers the vast majority of the market: Apple Watch (20mm/22mm), Samsung Galaxy Watch (20mm/22mm), Garmin Forerunner, Venu, Polar, Withings ScanWatch (18mm to 22mm), Amazfit, Fossil, TicWatch, Xiaomi, OnePlus, Honor, Oppo (22mm). Models with 26mm lugs are not compatible with Smartlet. This includes the Garmin Fenix 6X/7X/8 51mm, Garmin Instinct 2X, Garmin Epix Pro 51mm, Coros Vertix, and Kospet Tank. Some smartwatches use proprietary band systems (Google Pixel Watch, Whoop, certain Casio G-Shock): a conversion adapter may be required in those cases. Smartlet does not sell these adapters directly.
Do smartwatch sensors still work when attached to Smartlet?
Yes. The Smartlet module positions your smartwatch on the outer face of your strap, maintaining direct skin contact for all optical sensors. ECG, SpO2, heart rate, skin temperature, and motion sensors all continue to function normally. GPS, altimeter, and barometer are hardware-based and completely unaffected.
Does Smartlet work with all mechanical watches?
Smartlet works with any mechanical, automatic, or quartz watch with a standard lug width between 18mm and 24mm. This covers the vast majority of men's and unisex watches including Rolex, Omega, Tudor, TAG Heuer, Breitling, IWC, Seiko, and hundreds of other brands.
Is Smartlet reversible?
Yes. Smartlet attaches and detaches in seconds with no tools required. Your mechanical watch strap, case, and lugs are not modified in any way. The spring-loaded mechanism makes zero metal-to-metal contact with the watch case.