On the Wrist

Every watch tells a story. Every strap changes it.

The Smartlet Journal covers watch strap compatibility, modular wearables, and the collector's question that started it all: mechanical watch or smartwatch? Our answer: both.

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Smartlet One Classic bracelet holding a mechanical watch on top and a sensor underneath

How to wear a Whoop with a Rolex, on one wrist

October 18, 2026

The Rolex on top, the Whoop 5.0 or MG underneath, against the skin, on one Smartlet bracelet. Which Rolex fits at which lug width, which...

The lug hole and the pin

June 26, 2026

Everyone quotes lug width. The detail that actually decides whether a watch can be dual-worn is a hole about a millimetre across that most collectors...

How to choose a wearable you can wear with your watch

June 18, 2026

Choosing a wearable is easy until you refuse to give up your mechanical watch. Here is how to pick one that sits with it, not...

The spring bar: how a 1.5mm steel cylinder holds your watch together

June 1, 2026

There is a small steel cylinder, about 1.5 millimetres in diameter, that holds your watch onto your wrist. It contains a tiny internal spring and...

How to read your smartwatch ECG results and when to act

May 20, 2026

More people than ever are checking ECG readings on their wrist. Here is what those results actually mean and what to do with them. ...

How to build a morning routine around wearing two watches

May 14, 2026

The hardest part of dual wear isn't the hardware. It's the habit. Here's how to make it automatic. ...

Cartier Tank + Apple Watch: the elegant dual-wear guide

May 13, 2026

A dress legend meets modern health tech. Here's how Tank owners wear both without compromise. ...

Watch lug styles explained: what they mean for dual-wear

May 7, 2026

Straight, twisted, drilled, hooded, integrated, crab claw, hidden. The seven lug styles every collector should know, and why they matter for dual-wear. ...