Apple is touting the Apple Watch Ultra’s dual-frequency GPS support, viz., it uses the GPS L5 band in addition to L1 to improve accuracy. The new L5 signal is higher power and is supposed to provide more robust service, but with only 17 satellites broadcasting on it it’s not yet fully operational. Still, a Reddit user was able to document the improved accuracy by conducting an unexpected stress test: mowing the lawn. With the Ultra the mowing rows can be made out, whereas the tracks made with a series 4 watch were all over the place. [9to5Mac]

While the Ultra is the only Apple Watch that can use the L5 band, watchOS 9 adds a redesigned Compass app and a Backtrack feature that lets users retrace their steps using on-the-fly waypoints and GPS traces. MacRumors has a tutorial. This is something I’m looking forward to trying out: my series 8 watch arrived last week.