Since iOS13 does trails not record the track, when display is switched off. Other Apps like komoot and Maps3D are recording pretty well at the same time.
As soon as the mobile is unlocked and trails in the foreground than it continues to write the GPS data.
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I have the same problem. Please, guys, fix this issue. If you’re too busy, I’d be happy to help, having developed several fairly large commercial iOS apps in the past… Or consider open sourcing the code, while still maintaining the reference implementation as a commercial app?
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