Your mechanical watch meets modern health tracking

Your mechanical watch meets modern health tracking

Smartlet replaces your watch strap and hosts any Apple Watch, Garmin, or Samsung Galaxy Watch on the same wrist. Works with every major brand, 18mm to 24mm. No modification to the watch. Fully reversible.
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Compatibility

Your mechanical watch meets modern health tracking

Smartlet replaces your watch strap and hosts any Apple Watch, Garmin, or Samsung Galaxy Watch on the same wrist. Works with every major brand, 18mm to 24mm. No modification to the watch. Fully reversible.
27
Brands with full guides
18-24mm
Native lug range
0
Modifications required

Choose your watch brand

Compatible
Switzerland · Est. 1905
Rolex
The reference point for mechanical watchmaking. Rolex combines exceptional finishing, in-house movements, and robust build quality across every collection.
18.0mm / 19.0mm / 20.0mm / 21.0mm / 22.0mm / 23.0mmView guide →
Compatible
Switzerland · Est. 1848
Omega
Official timekeeper of the Olympic Games and worn on the Moon. Omega combines horological heritage with technical innovation across Seamaster, Speedmaster, and Constellation.
18.0mm / 19.0mm / 20.0mm / 21.0mm / 22.0mm / 23.0mmView guide →
Compatible
Switzerland · Est. 1926
Tudor
Founded by Hans Wilsdorf alongside Rolex, Tudor offers Swiss manufacture quality with accessible pricing. The Black Bay and Pelagos are among the most respected sport watches in production.
18.0mm / 19.0mm / 20.0mm / 22.0mmView guide →
Compatible
Switzerland · Est. 1860
TAG Heuer
Pioneer of avant-garde chronography since 1860. TAG Heuer combines motorsport heritage, high-frequency precision, and bold design across the Carrera, Monaco, and Aquaracer.
18.0mm / 19.0mm / 20.0mm / 21.0mm / 22.0mmView guide →
Compatible
Japan · Est. 1881
Seiko
Japan's most iconic watchmaker. Seiko spans the full range from accessible automatics to Grand Seiko, combining in-house movements, Spring Drive technology, and exceptional value.
18.0mm / 19.0mm / 20.0mm / 21.0mm / 22.0mm / 23.0mm / 24.0mmView guide →
Compatible
Switzerland · Est. 1884
Breitling
Instruments for professionals. Breitling builds precision chronographs for aviation, diving, and motorsport, combining technical mastery with distinctive design language.
20.0mm / 21.0mm / 22.0mm / 24.0mmView guide →
Compatible
Switzerland · Est. 1868
IWC
Engineering precision from Schaffhausen. IWC combines technical mastery with restrained elegance across the Portugieser, Pilot's, Aquatimer, and Portofino collections.
18.0mm / 20.0mm / 21.0mm / 22.0mmView guide →
Compatible
France · Est. 1992
Bell & Ross
Built around the cockpit instrument. Bell & Ross's square BR 03 and round BR 05 translate aviation legibility into wearable form, with lug widths from 20mm to 24mm.
20.0mm / 22.0mm / 24.0mmView guide →
Compatible
Switzerland · Est. 1735
Blancpain
The world's oldest watch brand still in production. Blancpain's Fifty Fathoms defined the dive watch category in 1953 and remains its most referenced benchmark.
18.0mm / 19.0mm / 20.0mm / 22.0mm / 23.0mm / 24.0mmView guide →
Compatible
France · Est. 1847
Cartier
The jeweller who invented the wristwatch. Cartier's Santos, Tank, and Ballon Bleu are as much objects of art as instruments of time, covering one of the widest lug width ranges in the industry.
18.0mm / 19.0mm / 20.0mm / 21.0mm / 22.0mm / 23.0mm / 24.0mmView guide →
Compatible
United Kingdom · Est. 2004
Christopher Ward
Direct-to-consumer Swiss watchmaking from the UK. Christopher Ward offers in-house movement development, exceptional finishing, and honest pricing across the C63, C60, and C65.
18.0mm / 20.0mm / 22.0mmView guide →
Compatible
Switzerland · Est. 1889
Doxa
The cult dive watch with the orange dial. Doxa's SUB 300 has carried professional diver credentials and a fiercely loyal following since its 1967 launch.
18.0mm / 19.0mm / 20.0mm / 21.0mm / 22.0mmView guide →
Compatible
Switzerland · Est. 2011
Formex
Swiss independent watchmaking with a patented floating case system. Formex delivers in-house finishing, COSC certification, and serious horology at an honest price point.
18.0mm / 20.0mm / 22.0mmView guide →
Compatible
Japan · Est. 1960
Grand Seiko
The summit of Japanese finishing and dial artistry. Grand Seiko combines Zaratsu polishing, seasonal dial inspiration, and the unique Spring Drive movement made in Shinshu and Shizukuishi.
18.0mm / 19.0mm / 20.0mm / 21.0mm / 22.0mmView guide →
Compatible
Switzerland / USA · Est. 1892
Hamilton
Born in America, built in Switzerland. Hamilton combines American heritage and Hollywood glamour with Swiss precision across the Khaki Field, Khaki Aviation, and Jazzmaster.
18.0mm / 19.0mm / 20.0mm / 21.0mm / 22.0mm / 24.0mmView guide →
Compatible
Switzerland · Est. 1833
Jaeger-LeCoultre
The watchmaker's watchmaker. Jaeger-LeCoultre has produced over 1,400 calibres and iconic models including the Reverso, Master, and Polaris across nearly two centuries.
18.0mm / 19.0mm / 20.0mm / 21.0mm / 22.0mmView guide →
Compatible
Switzerland · Est. 1832
Longines
Official timekeeper of major sporting events for over a century. Longines combines elegant Swiss design, horological heritage, and exceptional finishing at an accessible price point.
18.0mm / 19.0mm / 20.0mm / 21.0mm / 22.0mm / 23.0mmView guide →
Compatible
Switzerland · Est. 1918
Mido
Swiss precision inspired by architecture. Mido draws design cues from landmarks worldwide and pairs them with COSC-certified ETA movements and strong water resistance ratings.
18.0mm / 19.0mm / 20.0mm / 21.0mm / 22.0mmView guide →
Compatible
Switzerland · Est. 1904
Oris
Proudly independent since 1904. Oris builds exclusively mechanical watches with strong environmental commitments, clean design, and in-house calibres across the Aquis and Divers Sixty-Five.
18.0mm / 19.0mm / 20.0mm / 21.0mm / 22.0mm / 24.0mmView guide →
Compatible
Italy / Switzerland · Est. 1860
Panerai
Born in Florence, built for the Italian Navy. Panerai's oversized cushion cases and signature crown-protecting bridge make it one of the most recognisable sport watch silhouettes in the world.
20.0mm / 22.0mm / 24.0mmView guide →
Compatible
Germany · Est. 1972
Porsche Design
Industrial design applied to horology. Ferdinand Alexander Porsche's 1972 all-black titanium Chronograph 1 redefined what a watch case could look like, a legacy the brand carries forward.
20.0mm / 22.0mmView guide →
Compatible
Switzerland · Est. 1917
Rado
Pioneering hard materials in watchmaking since the 1960s. Rado's plasma ceramic and sapphire cases combine scratch resistance with a distinctive aesthetic, anchored by the Captain Cook and DiaStar.
18.0mm / 19.0mm / 20.0mm / 21.0mm / 22.0mmView guide →
Compatible
Germany · Est. 1961
Sinn
German instrument watchmaking without compromise. Sinn's proprietary technologies - Ar-dehumidifying capsules, copper sulfate, and TEGIMENT hardening - set a technical benchmark for tool watches.
20.0mm / 22.0mmView guide →
Compatible
United States · Est. 1854
Timex
The watch that made timekeeping democratic. Timex's Marlin, Q Timex, and Expedition lines combine accessible pricing with genuine horological heritage and a growing collector community.
18.0mm / 20.0mm / 22.0mmView guide →
Compatible
Switzerland · Est. 1853
Tissot
Official timekeeper of MotoGP, the NBA, and the Tour de France. Tissot offers Swiss precision and authentic design across the PRX, T-Sport, and Seastar collections.
18.0mm / 19.0mm / 20.0mm / 22.0mmView guide →
Compatible
France · Est. 1948
Yema
The independent French watchmaker with a cult following. Yema's Superman Heritage and Navygraf carry a distinct French character, reinforced by in-house manufacture movements since 2018.
18.0mm / 19.0mm / 20.0mm / 22.0mmView guide →
Compatible
Switzerland · Est. 1865
Zenith
Home of the El Primero, the first integrated automatic chronograph. Zenith's Le Locle manufacture combines historical depth with contemporary design across the Chronomaster and Defy collections.
18.0mm / 19.0mm / 20.0mm / 21.0mm / 22.0mm / 23.0mm / 24.0mmView guide →

Other compatible brands

A. Lange & Söhne
19mm to 22mm · 41 models
Akrone
20mm / 22mm · 7 models
Alpina
18mm to 22mm · 47 models
Amida
18mm / 19mm / 20mm · 26 models
Audemars Piguet
20mm / 21mm / 22mm · 10 models
Ball
18mm / 20mm / 22mm · 17 models
Baltic
20mm · 34 models
Baume & Mercier
18mm to 22mm · 32 models
Beaubleu
20mm · 24 models
Benrus
18mm / 20mm · 48 models
Blackout Concept
20mm / 22mm · 13 models
Breguet
18mm to 22mm · 105 models
Bremont
18mm / 20mm / 22mm · 203 models
BRM
20mm / 22mm · 20 models
Bulova
18mm / 20mm / 22mm · 40 models
Casio
18mm to 24mm · 100 models
Certina
20mm / 22mm · 16 models
Charlie Paris
18mm / 20mm · 11 models
Chopard
18mm / 20mm / 22mm · 24 models
Citizen
18mm to 22mm · 229 models
Code41
18mm to 24mm · 54 models
Corum
18mm to 24mm · 22 models
Czapek
22mm · 5 models
Damasko
18mm / 20mm / 22mm · 206 models
Ebel
18mm to 22mm · 31 models
Elka
18mm to 22mm · 73 models
Eska
18mm / 19mm / 20mm · 51 models
Eterna
18mm to 24mm · 114 models
F.P. Journe
18mm to 24mm · 19 models
Farer
20mm / 22mm · 15 models
Fortis
18mm to 22mm · 117 models
Frederique Constant
18mm / 20mm / 22mm · 21 models
Furlan Marri
20mm · 17 models
Girard-Perregaux
18mm to 24mm · 64 models
Glashütte Original
18mm to 24mm · 110 models
Glycine
18mm to 24mm · 12 models
H. Moser & Cie.
19mm to 22mm · 24 models
Halios
20mm / 22mm · 14 models
Hanhart
18mm to 24mm · 20 models
Herbelin
18mm / 20mm / 22mm · 8 models
Junghans
18mm to 22mm · 36 models
Laco
18mm to 24mm · 46 models
Lorier
20mm · 12 models
Louis Erard
20mm / 22mm · 8 models
Louis Vuitton
18mm to 24mm · 31 models
Marathon
18mm / 20mm / 22mm · 8 models
March LA.B
20mm / 22mm · 7 models
Maurice Lacroix
20mm / 22mm · 14 models
MB&F
20mm / 22mm · 6 models
Ming
20mm / 22mm · 17 models
Montblanc
18mm to 22mm · 52 models
Movado
20mm / 22mm · 8 models
Muehle Glashuette
20mm / 22mm · 12 models
Nivada Grenchen
18mm to 22mm · 47 models
Nodus
20mm / 22mm · 13 models
Nomos
18mm / 19mm / 20mm · 43 models
Norqain
20mm / 22mm · 10 models
Orient Star
20mm / 22mm · 11 models
Parmigiani Fleurier
20mm / 22mm · 16 models
Patek Philippe
18mm to 22mm · 54 models
Pequignet
20mm / 21mm / 22mm · 17 models
Raketa
18mm to 22mm · 194 models
Ralf Tech
20mm / 22mm · 14 models
Raymond Weil
20mm / 22mm / 24mm · 30 models
Reservoir
20mm / 22mm / 24mm · 121 models
Ressence
20mm / 22mm / 24mm · 16 models
Serica
18mm / 20mm · 24 models
Space One
20mm / 22mm · 7 models
Squale
18mm / 20mm / 22mm · 31 models
Stowa
18mm / 20mm / 22mm · 50 models
Studio Underd0g
20mm · 4 models
Tutima
18mm to 22mm · 26 models
Unimatic
20mm / 22mm · 62 models
Universal Genève
18mm to 22mm · 77 models
Vacheron Constantin
18mm to 22mm · 40 models
Venezianico
18mm to 24mm · 11 models
Victorinox
18mm to 22mm · 56 models
Vostok
18mm to 24mm · 151 models
Vulcain
18mm / 20mm / 22mm · 21 models
Zodiac
18mm / 20mm / 22mm · 28 models

Explore further

Browse all
Smartwatches
14 smartwatch guides→
Browse all
Iconic Models
50+ iconic models→

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

  • Which watch brands are compatible with Smartlet?
    Any mechanical, automatic, or quartz watch with a standard lug width between 18mm and 24mm is compatible with Smartlet. This covers all major Swiss and Japanese manufacturers: Rolex, Omega, Tudor, TAG Heuer, Breitling, IWC, Seiko, Longines, Hamilton, Grand Seiko, Panerai, Cartier, Oris, Tissot, Christopher Ward, Bell & Ross, Blancpain, Jaeger-LeCoultre, Zenith, and hundreds of other brands. The 21mm lug width, used on the Rolex Explorer II and Omega Planet Ocean, is also natively supported without any adapter.
  • Does Smartlet modify or damage my watch?
    No. Smartlet attaches via standard spring bars, exactly as any watch strap does. The watch case, lugs, crystal, and bezel remain completely untouched. The spring-loaded mechanism makes zero metal-to-metal contact with the watch case. Fully reversible in seconds, with no tools required.
  • Do I need a specific Smartlet model for my watch lug width?
    No. Smartlet natively accommodates all standard lug widths from 18mm to 24mm in a single unit. There is no need to choose a specific version based on your watch lug width.
  • What is the difference between Classic, Shadow, and Titanium?
    The three Smartlet models share identical compatibility and functionality. The difference is purely material and finish. Classic uses brushed stainless steel. Shadow uses black PVD-coated stainless steel. Titanium uses grade 5 titanium for a lighter weight and premium finish. Choose the finish that best matches your watch case material and personal aesthetic.