Last year, I used RideWithGPS with iOS 17 Live Activities, it was battery-friendly and could show current speed and accumulated distance on a ride.

iOS 18 changed Live Activities in a way that RWGPS can't do that anymore on the lock screen.  RWGPS is trying to find a new way to do things, but for now it's not able to do any cycle-computer stuff on the lock screen.

What (battery-friendly) iOS app can you recommend as a cycle computer for use on a handlebar-mounted iPhone?