Things to try on iOS devices when you have poor GPS accuracy or location service issues

Changing some settings can often help in cases where tracking is not working when the app is backgrounded.

• In Avenza Maps, change the location source to internal only by doing the following: Avenza Maps > Settings > GPS Settings > tap the selected option under Location Source to adjust to - Use Only Internal Sources

• OS-level battery-saving settings also seem to sometimes affect the GPS when the screen is off. On iOS, you can check Battery > Lower Power Mode and make sure it's toggled off.

• In iOS settings, go to General > Background App Refresh and toggle it off then back on again for Avenza Maps.

• Reset network settings: Go to the settings app > General > Transfer or Reset iPhone > Reset > Reset Network Settings. Be careful here, if you’re not careful you can accidentally reset all the settings on your device and lose all your apps and data.