Polar Alignment - Polaris hour angle is a free Android application developed by UniVoid that helps amateur astronomers and astrophotographers determine the location of Polaris relative to the north celestial pole. The app is primarily targeted towards users who own a telescope with a German Equatorial Mount.

The app is designed to display the most important parameters required for aligning the mount. The 'save location' feature eliminates the need to turn on the GPS to get the hour angle of Polaris, thereby simplifying and speeding up the alignment process. The accuracy of the app allows for unguided short exposures with careful alignment of the mount, and even longer exposures with a wider field of view.