I'd love to have reported this myself, but my own wearables don't include any Garmin kit. Still, owners of Garmin fitness watches should be pretty happy by the continued support of their fitness gear on Windows 10 Mobile by Garmin. MSPU has the story, see below for a quote.

From MSPU:

Garmin Connect Mobile app has seen a major update to version v3.15 with many improvements which make the app a worthy competitor for the Fitbit app. The update brings support for music controls, improved sync, new charts and full support for notifications.

Some screens, also sourced from MSPU:

Syncing with a Garmin fitness device, and showing stats for the current day...

Showing an impressive amount of notification support on Windows 10 Mobile. Not bad for a 'dead' platform, eh?(!)

The official changelog is quoted as:

Version number: 3.15.0.0
Every Garmin update includes various bug fixes, performance and pairing improvements.

How did this app jump to version 3.15? Garmin Connect Mobile is standardizing our release versions across all our mobile platforms. Your friends on iOS and Android will be so happy!

Insights Demographics:

• Compare your stats with other Garmin users
• Use histograms to see your performance percentile

Stop taking wristys! Use our picture share feature and show us where you Garmin. Select an activity, tap Share and choose Share Photo with Stats to upload to Facebook or Twitter.

Great to see, anyway. See Garmin's generic mobile page here. And you can grab this UWP app in the Store here.