What's new in smartwatches?

04 Tem 09:32

In recent years, one of the most notable innovations in smartwatches has been the improvement of biometric sensors. For example, next-generation PPG (photoplethysmography) sensors now use multiple wavelengths to enhance measurement accuracy. When integrated with Cortex M7/M4-based processors, these sensors achieve over 95% accuracy in heart rate and SpO2 readings. Additionally, multi-sensor approaches that combine skin conductance and body temperature data for stress level estimation are becoming more common—one of the best examples being the Polar Vantage series. In terms of battery life, material science has made significant contributions. For instance, models powered by Apple’s low-power S8 chip, introduced with the W3 chip in 2023, can last 5-7 days even with intensive sensor use. On the display side, quantum dot OLEDs are starting to make an impact, improving both color accuracy and brightness efficiency by up to 30%. In my experience, one of the longest-lasting is the Garmin Fenix 7, which can run for up to 14 days with GPS and other sensors active. There have also been major advancements in offline exercise tracking. While older watches relied heavily on GPS data, modern devices now support LEO satellite-based NAVIC, Galileo, and GLONASS—meaning more stable positioning even in urban centers. For example, the Whoop 4.0 can estimate distances of up to 1km using accelerometers alone, even without GPS, which is a game-changer for city runners. Post-workout recovery data has also improved, with Sleep Score and HRV (heart rate variability) analysis helping refine training sessions.