Wear a Smartwatch with Your Cartier | Smartlet

Q: Does Smartlet modify my Cartier?

No. Smartlet replaces the strap via the standard spring-bar system. The Roman numeral case and signature crown remain completely untouched.

How it works

Three steps to both watches on one wrist

Choose your strap

Smartlet One is your new strap. It replaces the original bracelet or strap on your Cartier using the same spring-bar system. Lug widths 18mm / 19mm / 20mm are all natively supported.

Clip in your watch

Attach the Smartlet strap to your Cartier by fitting the spring bars into the lugs, exactly as with any standard strap change. No tools required. Fully reversible in seconds.

Clip in your smartwatch

Slide your smartwatch into the Smartlet module. It locks onto the strap module on the wrist side of your wrist. All sensors remain fully operational. Both watches run simultaneously.

Model guides

Cartier iconic models

Each guide covers all references, variants, lug widths, and step-by-step Smartlet installation for one specific model line.

Compatible

Cartier

Cartier Santos

The first wristwatch made for aviation. Square case, exposed screws, 100m water resistance.

Case

39.8mm

Lug width

19mm / 20mm / 23mm / 24mm

Movement

Cal. 1847 MC

References

19mm / 20mm / 23mm / 24mmView full guide →

Full database

Other Cartier models

146 references grouped into 9 model families. All compatible. Expand any group to see variants, references, and specifications.

Ballon Bleu

19mm / 20mm3 refs · 1 variant+

Reference Material Dial Lug Smartlet CPCP-BB-2005 18K Yellow Gold Blue Paris 19mm Compatible WHBB0018 18K White Gold Skeleton 20mm Compatible WHBB0007 Platinum Silver 20mm Compatible

Calibre de Cartier

22mm8 refs · 1 variant+

Reference Material Dial Lug Smartlet W7100056 Adlc Steel Black 22mm Compatible W7100016 Stainless Steel Silver 22mm Compatible W7100015 Stainless Steel Black 22mm Compatible W7100041 Stainless Steel Silver 22mm Compatible W7100061 Stainless Steel Silver 22mm Compatible W7100062 Stainless Steel Black 22mm Compatible W7100052 Stainless Steel Black 22mm Compatible W7100055 Stainless Steel Blue 22mm Compatible

Drive de Cartier

20mm9 refs · 3 variants+

Reference Material Dial Lug Smartlet

Drive Moonphase

DRIVE-MP-PLAT-2018 Platinum Silver 20mm Compatible

Drive Tourbillon

Drive-TB-WG-2019 18K White Gold Silver 20mm Compatible

Drive de

WGDR0006 18K Pink Gold Silver 20mm Compatible WSNM0008 18K Pink Gold Silver Moonphase 20mm Compatible WGNM0008 18K White Gold Silver 20mm Compatible WGNM0004 Stainless Steel Silver 20mm Compatible WGNM0005 Stainless Steel Grey 20mm Compatible WSNM0005 Stainless Steel Silver Moonphase 20mm Compatible WSNM0011 Stainless Steel Silver 20mm Compatible

Pasha

18mm / 20mm / 22mm7 refs · 4 variants+

Reference Material Dial Lug Smartlet

Pasha 38

W30012 18K Yellow Gold Silver 20mm Compatible W31074M7 Stainless Steel Silver 20mm Compatible

Pasha 41

WSPA0018 Stainless Steel Blue 20mm Compatible

Pasha 42

WHPA0007 18K White Gold Skeleton 22mm Compatible W31088U2 Stainless Steel Silver 22mm Compatible

Pasha C

W31043M7 Stainless Steel Black 18mm Compatible W31030H3 Stainless Steel Silver 18mm Compatible

Ronde

18mm / 20mm5 refs · 3 variants+

Reference Material Dial Lug Smartlet

Ronde Astromystérieuse

WHRO0033 Platinum Mysterious Silver 20mm Compatible

Ronde Louis

W6800151 18K Yellow Gold Silver 18mm Compatible W9001352 18K White Gold Skeleton 20mm Compatible

Ronde Solo

WSRN0002 Stainless Steel Silver 20mm Compatible WSRN0003 Stainless Steel Silver 18mm Compatible

Rotonde

20mm / 22mm34 refs · 15 variants+

Reference Material Dial Lug Smartlet

Rotonde Annual

WR007001-AC Stainless Steel Silver 20mm Compatible WR007001 Stainless Steel Silver 20mm Compatible

Rotonde Astronomystérieuse

WHRO0033 18K White Gold Silver Mysterious 20mm Compatible ASTRO-WG-2019 18K White Gold Silver 20mm Compatible

Rotonde Astroregulateur

WHAST0001 Platinum Silver 22mm Compatible

Rotonde Astrotourbillon

WHR0N0005 18K Pink Gold Silver 22mm Compatible WHR0N0007 18K White Gold Skeleton 22mm Compatible WHRON0003 Platinum Silver 22mm Compatible

Rotonde Day

WR007009 Stainless Steel Silver Day/Night 20mm Compatible DAYNIGHT-PLAT-2015 Platinum Silver/Blue 20mm Compatible

Rotonde Double

WHDT0001 Platinum Silver 22mm Compatible WTG0001 Platinum Silver 22mm Compatible

Rotonde Earth

WHRO0017 18K Pink Gold Blue Lunar 22mm Compatible WHRO0016 Platinum Blue Lunar 22mm Compatible

Rotonde Flying

W1556219 18K Pink Gold Silver 20mm Compatible W1556218 18K White Gold Silver 20mm Compatible

Rotonde Grand

WHRO0009 Platinum Silver 22mm Compatible

Rotonde Grande

WHRO0009 Platinum Silver 22mm Compatible WHRO0013 Platinum Silver 22mm Compatible

Rotonde Lunar

LUN-ORB-WG-2018 18K Wg Navy 22mm Compatible

Rotonde Minute

WHXR0002 18K Pink Gold Silver 22mm Compatible WHME0003 Platinum Silver 22mm Compatible

Rotonde Mysterious

W1556233 18K Pink Gold Silver 20mm Compatible WHRO0003 18K White Gold Silver 20mm Compatible WHDD0001 Platinum Silver 22mm Compatible WSRN0002 Stainless Steel Silver 20mm Compatible

Rotonde Perpetual

RRPC-PT-2014 Platinum Silver 20mm Compatible

Rotonde Skeleton

SKE-ASTRO-2013 White Gold Skeleton 22mm Compatible WHRO0005 18K White Gold Skeleton 22mm Compatible WHSA0009 18K White Gold Skeleton 22mm Compatible WHRA0016 18K White Gold Skeleton Panther 20mm Compatible MRSK-PLAT-2016 Platinum Skeleton 22mm Compatible

Tank

18mm / 19mm / 20mm / 21mm / 22mm36 refs · 11 variants+

Reference Material Dial Lug Smartlet

Tank Américaine

W2603256 18K Yellow Gold Silver 20mm Compatible W2607456 18K White Gold Blue 20mm Compatible WAETA0017 18K White Gold Silver 22mm Compatible WJTA0013 18K Pink Gold Silver/ Diamonds 18mm Compatible WSTA0017 Stainless Steel Silver 20mm Compatible WSTA0016 Stainless Steel Silver 19mm Compatible

Tank Asymétrique

ASYM-RG-2020 18K Rg Silver 20mm Compatible ASYM-PLAT-2020 Platinum Silver 20mm Compatible

Tank Basculante

BASC-1932 18K White Gold White Enamel 18mm Compatible BASC-CPCP-1999 18K Yellow Gold Guilloché Silver 18mm Compatible BASC-STEEL-1990 Stainless Steel Silver 18mm Compatible BASC-XL-2004 Stainless Steel Silver 20mm Compatible

Tank Chinoise

CHIN-1922 18K Yellow Gold White Enamel 18mm Compatible CHIN-CPCP-1998 18K Yellow Gold Silver 18mm Compatible WGTA0075 18K Rose Gold Silver 20mm Compatible WGTA0074 Platinum Silver 20mm Compatible

Tank Cintree

CINT-PAR-1965 18K Yellow Gold Silver 20mm Compatible

Tank Cintrée

CINT-1921 18K Yellow Gold White Enamel 20mm Compatible CINT-CPCP-1998 18K Yellow Gold Guilloché Silver 20mm Compatible CINT-CPCP-RG-2002 18K Rose Gold Guilloché 20mm Compatible WHCT0003 18K Yellow Gold Skeleton 20mm Compatible CINT-1935 Platinum White 20mm Compatible CINT-PLAT-BLU-2018 Platinum Silver/Blue 20mm Compatible CINT-ANNIV-2021 Platinum Silver 20mm Compatible TCP-SKEL-2021 Platinum Skeleton 21mm Compatible

Tank Ellipse

ELLIPSE-1970 18K Yellow Gold White 18mm Compatible

Tank Etanche

T-ETANCHE-1931 Stainless Steel White 18mm Compatible

Tank Louis

W1529756 18K Yellow Gold Silver 19mm Compatible WHTN0006 18K White Gold Skeleton 19mm Compatible WBCP0006 18K Pink Gold Blue 19mm Compatible WGTA0010 Platinum Silver 19mm Compatible

Tank Must

WSTA0042 Stainless Steel Silver 19mm Compatible WSTA0054 Stainless Steel Burgundy 19mm Compatible WSTA0055 Stainless Steel Green 19mm Compatible WSTA0056 Stainless Steel Blue 19mm Compatible

Tank Normale

NORM-PLAT-2023 Platinum Silver 18mm Compatible

Tortue

19mm / 20mm6 refs · 5 variants+

Reference Material Dial Lug Smartlet

Tortue 1912

TORT-1912-1998 18K Yellow Gold Silver 19mm Compatible

Tortue CPCP

TORT-CPCP-YG-1999 18K Yellow Gold Guilloché Silver 19mm Compatible

Tortue Monopoussoir

TORT-MONO-2004 18K Pink Gold Silver 19mm Compatible

Tortue Mysterious

TORT-MYS-RG-2015 18K Pink Gold Skeleton Mystery 19mm Compatible TORT-MYS-WG-2015 18K White Gold Skeleton Mystery 19mm Compatible

Tortue Tourbillon

PROTO-TORT-TB-2012 18K Wg Silver 20mm Compatible

Vintage / Others

18mm / 19mm / 20mm / 21mm / 22mm38 refs · 27 variants+

Reference Material Dial Lug Smartlet

Astrocalendar Pink

ASTROCAL-RG-2016 18K Pink Gold Silver 22mm Compatible

Astroregulateur Carbon

PROTO-ASTRO-2012 Carbon/Steel Black 22mm Compatible

Astrotourbillon Carbon

ASTRO-CARBON-2015 Carbon/Steel Black 22mm Compatible PROTO-ASTROCARB-2015 Carbon/Steel Black 22mm Compatible

CPCP Rotonde

ROT-MONO-CPCP-2007 18K Rose Gold Silver 22mm Compatible

CPCP Tank

TCT-CPCP-1999 18K Yellow Gold Silver 20mm Compatible TCHIN-CPCP-2004 18K Yellow Gold Guilloché 18mm Compatible

CPCP Tortue

TORT-MONO-CPCP-1998 18K Yellow Gold Guilloché 19mm Compatible TORT-QP-CPCP-2003 18K Pink Gold Guilloché Silver 19mm Compatible

Ceinture Paris

CEINT-1973 18K Yellow Gold Silver 18mm Compatible

Cintrée 1925

CINT-1925-SAL 18K Yellow Gold Salmon 20mm Compatible

Concept Carbon

FT-CARBON-2014 Carbon/Steel Black 22mm Compatible

Concept Diver

PROTO-DIVER-2015 Steel/Carbon Black 22mm Compatible

Crash Skeleton

WHTA0008 18K Pink Gold Skeleton 18mm Compatible WHTA0009 Platinum Skeleton 18mm Compatible

Grand Complication

GCSW-2019 18K White Gold Diamond Pavé 18mm Compatible

High Jewellery

HJ-TORT-RNBW-2022 18K Pg/Rainbow Gems Silver 18mm Compatible

ID One

ID-ONE-2010 Zirconia Ceramic Black 22mm Compatible

ID Two

ID-TWO-2012 Transparent Ceramyst Clear 22mm Compatible

ID-One Concept

IDONE-2010 Zirconia Ceramic Black 22mm Compatible

ID-Two Concept

IDTWO-2012 Transparent Ceramyst Transparent 22mm Compatible

Japan-Only Tank

TL-JDM-BLU-2012 18K Pg Blue 19mm Compatible TS-JDM-BLK-2018 Steel Black Roman 20mm Compatible

Masse Mystérieuse

WGMM0002 Platinum Skeleton Mystery 20mm Compatible

Middle East

TL-ME-GRN-2021 18K Pg Green Lacquer 19mm Compatible

Minute Repeater

WSMR0005 18K Pink Gold Silver 22mm Compatible WSMR0004 18K White Gold Silver 22mm Compatible

Mysterious Day

WHDA0001 18K Pink Gold Silver Day/Night 20mm Compatible

One-of-One Comète

HJ-COMET-2020 Wg/Diamonds/Sapphire Midnight Blue 18mm Compatible

Pebble London

PEBBLE-1972 18K Yellow Gold White Roman 18mm Compatible PEBBLE-2022 18K Yellow Gold White Roman 18mm Compatible PBB-PLAT-2023 Platinum Silver 18mm Compatible

Prototype Mysterious

PROTO-MH-2011 Stainless Steel Silver 20mm Compatible

Prototype Skeleton

PROTO-TANK-SKEL-2010 Steel Skeleton 20mm Compatible

Special Order

S0-SD-XL-2018 18K Wg Blue Enamel 20mm Compatible SO-TORT-SAL-2019 18K Pink Gold Salmon 19mm Compatible SO-CINT-SAL-2020 18K Yellow Gold Salmon 21mm Compatible SO-TONNEAU-PLAT-2016 Platinum Silver 22mm Compatible

Compatible smartwatches

Smartwatches to pair with your Cartier

Wear your smartwatch simultaneously with your Cartier via Smartlet One. Lug widths 18mm to 24mm natively supported.

View all compatible smartwatches →

Questions

Frequently asked questions

Does Smartlet work with the Cartier Santos?+

Yes. The Santos de Cartier Medium and Large use 20mm lugs, natively supported by Smartlet. The Santos Small uses 18mm lugs, also within the native range. Smartlet replaces the Santos interchangeable strap and positions your Apple Watch or Galaxy Watch on the underside of the same wrist. No tools required.

Does Smartlet work with the Cartier Tank?+

Yes. The Tank Must uses 19mm or 20mm lugs depending on size, both natively supported. The Tank Solo and Tank Louis Cartier also fall within the 18–20mm range. Smartlet installs via the standard spring-bar system and is fully reversible. Both watches run simultaneously on the same wrist.

Does Smartlet modify my Cartier?+

No. Smartlet installs via the standard spring-bar system, the same mechanism used for any strap change. The Roman numeral dial, signature crown, and polished case remain completely untouched. The installation takes under 30 seconds and is fully reversible without any specialist tools.

Which lug widths does Smartlet support natively?+

Smartlet supports lug widths from 18mm to 24mm natively. Cartier models use 18mm, 19mm, or 20mm lugs depending on the reference and size. All Cartier references in our database fall within this native range. No adapter or modification is needed to install Smartlet on your Cartier.

Join the movement

Three steps to both watches on one wrist

Cartier iconic models

Other Cartier models

Smartwatches to pair with your Cartier

Frequently asked questions