This compass adopt an optimized algorithm recommended from Google, it's more accurate and more sensitive, so the drawing will be a little jitter.send your current position to you friends, you will never lost and easy to get help now.bugfix: support device without GPS.Usage of direction:Red pointer pointed to the magnetic north, not the real geography north. This magnetic declination is different from different place of the world. It's generally less than a few degree.Compass works according from the magnetic, it's easy affected by the electronic equipments, so please far way from these kind of equipments.For getting more accurate, please set this device on a stable platform.

Usage of level:The level also is easy to use.The more red dot, the more decline of the level.

Change the theme:It's easy to change the wallpaper or compass planet, by move your figure on the screen.move you finger on the screen to left or right: change the wallpaper;move you finger on the screen to up or down: change the compass planet.