Smartlet One
Smartlet One
One concept. Three different personalities
Watch Brand Compatibility Guide - All Brands | Smartlet
Watch brand 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
Full compatibility guides
Choose your watch brand
Select your brand to see the full compatibility guide, compatible models, and strap specifications.
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.
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.
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.
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.
Compatible
Switzerland · Est. 1884
Breitling
Instruments for professionals. Breitling builds precision chronographs for aviation, diving, and motorsport, combining technical mastery with distinctive design language.
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.
Compatible
Switzerland · Est. 1868
IWC Schaffhausen
Engineering precision from Schaffhausen. IWC combines technical mastery with restrained elegance across the Portugieser, Pilot's, Aquatimer, and Portofino collections.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
The universal rule: 18mm to 24mm, native
Smartlet natively supports all standard lug widths from 18mm to 24mm with no adapter required. This covers the entire current production range of all major Swiss and Japanese brands. The 21mm lug width, common on the Rolex Explorer II and Omega Planet Ocean, is also natively supported.
⬤ 18mm: native
⬤ 19mm: native
⬤ 20mm: native
⬤ 21mm: native
⬤ 22mm: native
⬤ 24mm: native
How it works
Three steps. No compromise.
Smartlet attaches to any watch strap via standard spring bars. No tools, no modification, no risk to your watch.
01
Swap the strap
Smartlet replaces your existing watch strap using standard spring bars. The watch case and lugs are untouched. Choose Classic, Shadow, or Titanium to match your watch aesthetic.
02
Attach your smartwatch
Clip your Apple Watch, Garmin, or Samsung into the Smartlet module. It locks securely via the patented click system. The module sits on the wrist side of the strap, maintaining direct skin contact for all sensors.
03
Wear both simultaneously
Both watches now sit on the same wrist. Your mechanical watch tells the time. Your smartwatch tracks health data. All sensors, GPS, ECG, and SpO2 operate at full capacity.
Extended database
Other compatible brands
These brands do not yet have a dedicated Smartlet guide, but all references with standard lug widths from 18mm to 24mm are compatible with Smartlet.
A. Lange & Söhne
Akrone
Alpina
Amida
Audemars Piguet
Ball
Baltic
Baume & Mercier
Beaubleu
Benrus
Blackout Concept
Breguet
Bremont
BRM
Bulova
Casio
Certina
Charlie Paris
Chopard
Citizen
Code41
Corum
Czapek
Damasko
Ebel
Elka
Eska
Eterna
F.P. Journe
Farer
Fortis
Frederique Constant
Furlan Marri
Girard-Perregaux
Glashütte Original
Glycine
H. Moser & Cie.
Halios
Hanhart
Herbelin
Junghans
Laco
Lorier
Louis Erard
Louis Vuitton
Marathon
March LA.B
Maurice Lacroix
MB&F
Ming
Montblanc
Movado
Muehle Glashuette
Nivada Grenchen
Nodus
Nomos
Norqain
Orient Star
Parmigiani Fleurier
Patek Philippe
Pequignet
Raketa
Ralf Tech
Raymond Weil
Reservoir
Ressence
Serica
Space One
Squale
Stowa
Studio Underd0g
Tutima
Unimatic
Universal Genève
Vacheron Constantin
Venezianico
Victorinox
Vostok
Vulcain
Zodiac
Questions
Frequently asked
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.
