Wear your Amazfit and your mechanical watch at the same time

Wear your Amazfit and your mechanical watch at the same time

83 Amazfit models work with Smartlet One, from the GTR and Balance to the T-Rex and Bip. Most use standard 20mm or 22mm bands, natively supported with no adapter. Setup takes minutes and is fully reversible.
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Amazfit compatibility

Wear your Amazfit and your mechanical watch at the same time

In short 83 Amazfit models work with Smartlet One, from the GTR and Balance to the T-Rex and Bip. Most use standard 20mm or 22mm bands, natively supported with no adapter. Setup takes minutes and is fully reversible.

Amazfit, from Zepp Health, covers everything from the slim Bip to the rugged T-Rex. Smartlet One positions your Amazfit underneath the wrist, with your mechanical watch on top, both running at full capacity.

Wear yours How it works
The problem
Choosing between health data and horological heritage every morning.
The solution
Smartlet One replaces your mechanical watch strap and positions your Amazfit on the same wrist, underneath, with no adapter for most models. Wear both simultaneously.
Models
GTR - GTS - Balance - Active - Cheetah - T-Rex - Bip
Lug width
mm
Sensors
Heart rate +
Reversible
In seconds
How it works

See how it snaps on

Fits your Wear Your Amazfit and Your Mechanical Watch at the Same Time — adapter includedWear yours →

Choose your edition

One mechanism. Three personalities.

Every Smartlet One includes the dedicated adapter for your wearable. Pick the finish that matches your style.

Smartlet One - Shadow - Smartlet

For the explorer

Smartlet One - Shadow

€399,00

5.0 (21)

Stealth. Switch in seconds, leave no trace.

  • Material SS316L steel, black PVD
  • Weight ~100g
  • Compatible with Rolex, Omega, Seiko + 100 more
Buy now
Compatibility

Amazfit models supported

Amazfit GTR - GTS - Balance - Active - Cheetah - T-Rex - Bip
Compatible
Amazfit GTR, GTS, Balance, Active, Cheetah, T-Rex and Bip models attach through standard 20mm or 22mm quick-release bands, natively supported by Smartlet with no adapter. The T-Rex Ultra 2, the T-Rex Dual Solar and the Arc are not compatible. Amazfit Band models need an adapter.
All Amazfit sensors remain fully operational

Smartlet positions your wearable with full skin contact maintained at all times. Health data accuracy is unaffected.

Heart rateGPSSpO2Barometer
Frequently paired

Mechanical watches worn with Amazfit

The most common combinations our customers wear. Find your mechanical watch and discover the right Smartlet edition.

Rolex
Rolex Cosmograph Daytona·Rolex Datejust 41·Rolex Explorer·Rolex GMT-Master II
18.0mm / 19.0mm / 20.0mm / 21.0mm / 22.0mm / 23.0mm
Omega
Omega Aqua Terra·Omega Constellation Co-Axial·Omega De Ville Tresor·Omega Seamaster 300M
18.0mm / 19.0mm / 20.0mm / 21.0mm / 22.0mm / 24.0mm
Tudor
Tudor Black Bay 41·Tudor Pelagos 42·Tudor Ranger·Tudor Monarch
18.0mm / 19.0mm / 20.0mm / 21.0mm / 22.0mm / 23.0mm / 24.0mm
TAG Heuer
TAG Heuer Aquaracer Professional 300·TAG Heuer Carrera Chronograph 42·TAG Heuer Formula 1·TAG Heuer Monaco
18.0mm / 19.0mm / 20.0mm / 21.0mm / 22.0mm / 23.0mm
Seiko
Seiko Presage·Seiko Prospex SPB143·Seiko SKX Diver·Seiko Seiko 5
18.0mm / 19.0mm / 20.0mm / 21.0mm / 22.0mm / 23.0mm / 24.0mm
Breitling
Breitling Avenger·Breitling Navitimer B01 43·Breitling Superocean Automatic
18.0mm / 19.0mm / 20.0mm / 21.0mm / 22.0mm / 23.0mm / 24.0mm
IWC
IWC Big Pilot·IWC Portugieser Automatic 40
18.0mm / 19.0mm / 20.0mm / 21.0mm / 22.0mm / 24.0mm
View all brands
27 brands covered
Also compatible

Other smartwatches

Smartlet works with all major smartwatches via dedicated adapters or native lug widths.

Apple Watch
Samsung Galaxy Watch
Garmin Forerunner
Polar Vantage
Google Pixel Watch
Huawei Watch GT
Fitbit Charge
Fitbit Air
Whoop
Garmin Venu
Withings Scanwatch
Coros
Suunto
Panther Eclipse
G-Shock
View all
Smartwatch compatibility guide

Step by step

Replace your strap
01

Replace your strap

Smartlet replaces your mechanical watch strap via the standard spring-bar system. Classic, Shadow, or Titanium. No tools required.

Connect your wearable
02

Connect your wearable

Smartlet uses a dedicated adapter or native lug pins depending on your smartwatch. The connector snaps onto the Smartlet module. Zero modification to the mechanical watch.

Wear both simultaneously
03

Wear both simultaneously

Both watches sit on the same wrist. All smartwatch sensors maintain direct skin contact and operate normally.

Questions

Frequently asked questions

  • Can I wear an Amazfit and a mechanical watch at the same time?
    Yes. Smartlet One holds your mechanical watch on top of the wrist and your Amazfit underneath, on one strap. Most Amazfit models use standard 20mm or 22mm quick-release bands, so no adapter is needed.
  • Which Amazfit models are compatible with Smartlet?
    83 Amazfit models in our base, across the GTR, GTS, Balance, Active, Cheetah, T-Rex and Bip lines. The T-Rex Ultra 2, the T-Rex Dual Solar and the Arc are not compatible. Amazfit Band models need an adapter.
  • Will Amazfit sensors still work with Smartlet?
    Yes. The Amazfit sits underneath the wrist with full skin contact, so heart rate, SpO2 and sleep tracking keep working as usual.
  • Does Smartlet damage or modify my mechanical watch?
    No. Smartlet replaces your standard watch strap using the existing spring-bar system. It makes no permanent modification to the watch case, lugs, or dial. The process is fully reversible in seconds. Your mechanical watch is unaffected and can be worn independently at any time by reinstalling its original strap. Smartlet is engineered to watchmaker tolerances and tested with the same care that goes into the watches it pairs with.