Lumysi

Most wearables look like equipment, which is fine at the gym and less so at dinner. Lumysi takes the opposite approach: a bracelet built first as jewelry, with sensors working quietly on the underside. The maker says the form was refined with a designer who has worked on Rolls-Royce-related products, and the housing is made from hypoallergenic titanium.

Finishes and bands

The housing comes in four finishes: gold, rose gold, midnight black and silver. Three band types are offered: polished 316L stainless steel, leather in brown or black, and a white silicone band intended for workouts. According to the maker, an adjustment mechanism lets the bracelet fit a wide range of wrist sizes.

No screen, by design

Lumysi has no display and stays silent, showing no notifications or reminders. Data is collected in the background and reviewed only when you open the companion app, which the maker says supports both iOS and Android.

Key claims from the maker

• Up to 7 days of continuous use per full charge, with a pocketable portable charging case
• 5ATM water resistance, intended for showering, swimming and sweaty training
• More than 30 health metrics, including heart rate, HRV, sleep depth, recovery, skin temperature, SpO2, daily activity and menstrual cycle tracking
• PPG optical sensor using green, red and infrared LEDs, updating data every 30 seconds, plus a skin temperature sensor and an accelerometer
• AI-generated insights in plain language that link sleep, prior activity and heart data into daily suggestions
• All measurement features and AI analysis available for life with no additional fees
• Encrypted health data stored on secure servers, which the maker says is not sold or shared with third parties

The campaign also argues that a wrist format avoids issues it attributes to smart rings, such as rotating and rubbing during lifts like deadlifts, and that the bracelet stays put so the sensors keep steady skin contact. As an example of the AI feature, the maker describes a morning note suggesting lighter activity and an earlier bedtime when HRV falls below its 7-day average after short sleep and heavy exercise.