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Steel HR Sapphire Signature

Hybrid Smartwatch

Get the look, the tech & premium sapphire glass.

Stronger than ever

Our Sapphire Signature collection raises the bar for the connected watch market. Usually available only within the luxury timepiece industry, sapphire glass is the finest choice when it comes to premium watch construction.

Sapphire glass—which scores a 9 out of 10 on the Mohs hardness scale—is made from aluminium oxide powder at high temperatures, creating a crystal that provides a distinctive robustness.

Designer look

Sapphire glass is just the beginning: all models in this collection feature a durable stainless steel case, premium coating, chrome indices, and Italian leather to help you enjoy living with a device that seamlessly works to improve your health.

Personal trainer & health coach

Steel HR features 24/7 heart rate monitoring, multisport tracking, connected GPS, and sleep tracking. It also allows you to go the distance and dive into whatever comes your way with a rechargeable battery that lasts up to 25 days and water resistance up to 50 meters.

Activity & Sleep

Seamlessly track steps, run, swim and much more—no fiddling needed. Plus, wear it at night to enjoy sleep tracking and the Smart Wake-Up feature.

Heart Rate

Track heart rate day & night and see continuous heart rate in workout mode along with info on time spent in heart rate zones: Peak, Intense, Moderate & Light.

Smart notifications

Get important notifications at a glance for calls, texts, alarms, and any app you set—a clever way to stay connected but decrease your overall screen time.

Waterproof to 50m

Jump in the pool, wash the dishes or take a shower with confidence: 5ATM is life-proof. Plus, the watch will automatically detect and track swim sessions.

Connected GPS

Start a workout session from your watch, and it will leverage your phone’s GPS to map your path, so you can see progress and even share a visual of your adventures.

Sapphire Glass

Luxury and sturdiness come together: Sapphire glass is highly scratch-resistant, so you don’t need to worry about scuffing up your tracker—the window will remain pristine with everyday use.

Get inspired

From the office to the gym, complete your look with this stunning, smart, and enviably strong accessory that will quickly become a necessity.

Customize your watch



Case color

Face color

Hybrid Smartwatch

Compatible with iOS & Android

- Heart rate monitoring: Track heart rate trends day and night, plus continuous heart rate in workout mode

- Activity tracking: Automatic walk, run, swim (water resistant - 50M) & 10+ activities recognized, plus calories burned & distance

- Sleep monitoring: Sleep cycle analysis (light and deep sleep) plus silent vibrating alarm with Smart Wake-Up

- Digital screen: Get text, call, and event notifications, plus view daily stats—like steps, distance, and heart rate—with the push of a button

- Long battery life: up to 25 days on a single charge, plus 20 more with time & activity tracking only

Free shipping

Enjoy free shipping from £99. Express shipping options also available.
See conditions

30-day returns

No regrets: if you're not happy with your product, you can return it within 30 days—no questions asked.

2-year warranty

Peace of mind: we'll repair or replace your device if there's a defect in materials or workmanship.
See the fine print

Technical Specifications

  • Connectivity
  • Metrics tracked
  • Device
  • In the box
iOS compatibility (iOS 10 and higher)

iPhone 4S and mode recent
iPod touch 5th generation and more recent
iPad 3rd generation and more recent

Android compatibility (6.0 and higher)

Requires a Bluetooth Low Energy device

Bluetooth connectivity

Bluetooth Low Energy needed.

Cannot be set up from a computer
Heart rate

Beats per minute


Based on user's motion


Based on the user’s profile for high precision


Health Mate app widget displays active & metabolic calories, as well as the total caloric expenditure


Automatically detected
In-app daily recap of duration and distance


Automatically detected
Duration and calories


Time it takes to fall asleep
Sleep cycles (light and deep sleep)
Sleep interruptions

Fitness Level assessment (Steel HR Sport only)

Via VO2 Max estimation

Dimensions and weight

36mm model: 36.3mm diameter (1.4’’), 13mm thickness (0.51’’), 18mm wristband width (0.71’’), 39g (watch only)
40mm model: 39.5mm diameter (1.6’’), 13mm thickness (0.51’’), 20mm wristband width (0.79’’), 49g (watch only)

Conditions of use

Water resistant up to 165 feet deep (50 m, 5 ATM)
Operating temperature: -10°C to 45°C (14°F to 113°)
Storage temperature: -20°C to 85°C (4°F to 185°)
E-Ink™ Screen

Silent Alarm

A slight vibration to wake you up at a preset time.


Heart rate infrared sensor
Day & Night motion sensor
High precision MEMS 3-axis accelerometer
Low power consumption

Battery life

Up to 25 days in normal use
Up to 5 days in workout mode
+ 20 additional days in power reserve mode (time and activity tracking only)

Steel HR

Steel HR with quick-release silicone strap


Steel HR Sport comes with a bicolored drilled silicone wristband which fits wrists with a circumference up to 230 mm (9.1"). Drilled silicone wristband provides durability and ventilation for comfort during sports.

Steel HR Limited Edition & Steel HR Sapphire models come with both a Premium (Milanese Mesh or Leather) band and an additional silicone band for sports


Magnetic charging cable

Installation guide


Free Health Mate app

To set up the alarm clock and fine tune daily activity/sleep objectives
To track up to 5 dimensions of your health - Activity, Sleep, Weight, Heart, Environment

Free Withings account

To securely store your data and make it readily available
Download your data at any time, free of charge

Find the perfect product for all your needs

Body Cardio

An advanced Wi-Fi scale that delivers full body composition, exclusive heart health metrics, and seamless tracking in the Health Mate app.

£ 129.95


A stylish watch that automatically tracks activity and sleep and never needs charging.

From £ 119.95

Steel HR Sport

A hybrid smartwatch specifically designed for your workout, featuring heart rate monitoring, multi-sport tracking, connected GPS and a Fitness Level assessment via V02 Max estimation.

£ 189.95

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