What can I do to improve my GPS accuracy?

First try restarting your phone. You may also want to check that your firmware is current as old firmware can result in poor GPS performance. Finally, check that Golfshot has access to the GPS hardware in your phone by opening the Settings for your Android and ensure all location services are turned on.

In the Golfshot app click on Settings > Battery Life > GPS Update Speed > Fastest

Settings > Battery Life > Always On