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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On the wrist

Man checks heart rate and watch at desk

Integrate HRV monitoring and mechanical watches: 86% accuracy

Discover how to combine chest strap HRV sensors with mechanical watches for accurate recovery tracking without sacrificing style or heritage craftsmanship. ...
Rolex and Apple Watch worn together on one wrist

Wear an Apple Watch and Rolex together for heart rate monitoring

Discover how to wear an Apple Watch underneath your Rolex for continuous heart rate monitoring without compromising luxury style or sensor accuracy using modular band...
Pilot wearing Navitimer and Apple Watch at table

Breitling Navitimer and Apple Watch: Aviation meets tech

Discover how pilots combine Breitling Navitimer heritage with Apple Watch connectivity through dual-wear solutions, hybrid alternatives, and modular strap technology for modern aviation. ...
Watch collector preparing spring bar workspace

Spring bar replacement: a watch collector's guide

Master spring bar replacement with this collector's guide covering precise measurement, quality tool selection, step-by-step installation, and troubleshooting for mechanical watches. ...
Man adjusting two watches on wrist in office

How to wear a smartwatch with a luxury watch safely

Learn how to wear a smartwatch and luxury watch together safely without scratches using modular strap systems, proper materials, and proven techniques. ...
Man comparing Sony Wena and analog watch

Sony Wena discontinued in 2026: Smartlet is the best alternative

Sony ended Wena 3 support in 2026, leaving users without smart features. Discover why Smartlet's modular design offers a superior alternative for watch enthusiasts. ...
Man wearing Apple Watch and Seamaster together

Omega Seamaster and Apple Watch: Can You Wear Both in 2026?

Discover how to wear your Omega Seamaster and Apple Watch together on one wrist in 2026 with modular bands, material options, and expert wearing tips....
Man measuring watch lug width at table

Complete lug width guide: 18mm to 24mm for collectors

Master lug width selection from 18mm to 24mm with precise measurement techniques, design insights, and material guidance for watch collectors seeking perfect strap compatibility. ...
Man wearing Rolex and Apple Watch together at table

How to wear a Rolex and Apple Watch together in 2026

Discover how to comfortably wear your Rolex Submariner and Apple Watch simultaneously using modular solutions that blend mechanical heritage with smart technology. ...
Person outside tech store with smart accessories

Marathon training and smartwatch monitoring: the data that separates smart preparation from injury

A 2024 PMC review confirmed that HRV-guided training produced greater endurance improvements than fixed-schedule programming. The practical requirement: a smartwatch on your wrist throughout the...
Watchmaker changing strap in cluttered workshop

How smartwatch heart monitoring saves lives: cases and global data

Global AFib prevalence rose from 33.5 million to 59 million between 2010 and 2019. Europe projects a doubling by 2060. Smartwatch ECG detection achieves 95...
Man changing modular smartwatch strap at workspace

How smartwatch sensors work: why orientation is irrelevant and skin contact is everything

Reflectance photoplethysmography places the LED and photodiode on the same side of the skin. There is no transmission through tissue and no orientation required. The...
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