https://apps.garmin.com/en-US/apps/116a5b59-29ae-4397-a70e-907d7e5f8e44
The next generation of the Hike app. With additional memory and sensors on the vivoactive HR, all be looking at adding new stuff. Right now, it makes use of the hardware compass and barometric Altimeter!
Like Hike, it's stats up and once it gets GPS, press start to begin the recording. There are then a number of screens you can swipe through to see data, like time-distance, pace-speed, altitude data, lat/lon data, and a chart that shows your hike so far. Pressing the back button while recording marks a waypoint, and pressing start pauses the recording, and gives you the option to resume, save, or discard the recording.
To learn about some of the basic functionaly here, see the thread for the initial version:
http://forums.garmin.com/showthread.php?335082-App-Hiking
Please post questions and problems here.