This update includes improvements to functions as listed below.
The exact changes may differ depending on your device model, country, and service provider.
To get the best from your device, please keep your device up to date and regularly check for software updates.

Galaxy Watch3 (SM-R840)


Build Number : R840XXU1BUE3
Tizen version : Tizen 5.5.0.2
Release Date : 2021-05-27
• Enhanced the auto walking/running icons
• Enhanced the 'Inactive time alerts' icon
• Improved device stability

Build Number : R840XXU1BUD2
Tizen version : Tizen 5.5.0.2
Release Date : 2021-04-29
· Improved system reliability

Build Number : R840XXU1BUD1
Tizen version : Tizen 5.5.0.2
Release Date : 2021-04-08
• Improved Messaging App stability  
• Improved WiFi stability  
• Improved system stability and reliability

Build Number : R840XXU1BUA8
Tizen version : Tizen 5.5.0.2
Release Date : 2021-02-04
• Improved Samsung Health Function
- You can now enjoy a group-walking challenge with your friends
- Reduced auto workout recognition time (running, rowing machine, elliptical)
- Enjoy home workout with a variety of fitness programs
• SmartThings Find
- You can find the location of the watch on the map.
• Hand Wash
- After downloading the Hand Wash app, your watch can automatically detect and time, when you start washing your hands
• Improved system stability and reliability

Build Number : R840XXU1BTK1
Tizen version : Tizen 5.5.0.1
Release Date : 2020-11-10
• Voice guidance provided via headset connected to mobile when exercising with a watch.
• Voice guidance provided for traveled distance and HR data, when Auto Lap feature is enabled during Running/Cycling.
• Improved Blood Oxygen measurement
• Improved system stability and reliability

Build Number : R840XXU1BTHA
Tizen version : Tizen 5.5.0.1
Release Date : 2020-09-23
• Added the new Samsung Health Monitor App for ECG measurements.
※ Available on Galaxy smartphones with Android 7.0 and later

Build Number : R840XXU1BTG6
Tizen version : Tizen 5.5.0.1
Release Date : 2020-08-12
- Blood Oxygen : Check how effectively your respiratory system transfers oxygen to the blood stream.
  * Not Available Countries : Algeria, Angola, Canada, France, Iran, Japan, Libya, South Africa, Thailand
- Advanced Running Analysis : Giving you the insights you need to improve your running form.
- VO2max : Check the maximum amount of oxygen you utilize during exercise to improve your endurance
- Sleep score : Check out sleep scores, a new way to understand your sleep patterns.