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Low-power mode for Maps.app
Authored by: chabig on Apr 04, '14 09:33:51AM

I wouldn't call this a "low-power mode". Any time you turn the screen off you cut power consumption. You can turn the screen off during music playback too, but again I wouldn't call that a low-power mode--just common sense.



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Low-power mode for Maps.app
Authored by: gopes on Apr 13, '14 10:07:37AM

Actually, I think this does provide power savings beyond simply turning off the screen. Whenever I do it, returning to the map always takes an extra couple seconds for the map to “get its bearings”, particularly regarding which direction I’m heading.

My guess is that with the screen off, iPhone doesn’t actively run the GPS chip but instead uses cell tower triangulation and WiFi for locations—which may also be why in screen-off mode the in-town directions are sometimes “off” for me. iPhone is supposed to auto-brighten the screen a half mile before a turn, for example, and that doesn’t always happen.

Regardless of what’s happening with the screen-off mode & tracking, I’ve also noticed that Maps seems to not do as much active tracking as other apps, like TomTom: the on-screen map does not always accurately reflect how close I am to a turn, even with the power plugged in. It’s a little bizarre…



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