We've just updated the iOS app to version 4.20, available now on the App Store.
Inside you'll find:
Storylines! Experience running with power in a new way with Stryd Storylines.
Fixed bug that was preventing the run from ending for some users
Added support for Series 4
New complication sizes
New elevation gain metric
Custom Auto Lap distance and unit
Changed lap notification to show lap distance
Fixed connection dialog so it shows on all screens
Changed lap behavior when auto-lap and side buttons lap are both
enabled to trigger an auto-lap after the auto-lap distance has been
traveled since the last lap (rather than aligning auto-laps to
multiples of the auto-lap distance)
Fixed issue causing a distance discrepancy in PowerCenter