By popular request, the app that iOS users have loved is now on Android. The core experience is here, with more features being added regularly.

Precise polar alignment for equatorial telescope mounts, day or night, with or without a polar scope.

Whether you are setting up for a night of visual observing or preparing for astrophotography, Polar Scope Align Pro tells you exactly where to position the pole star in your polar scope reticle for your location and time. No polar scope? The app can also guide alignment using your phone alone. The latest version of the polar alignment routine can even use a camera sun/star calibration for better accuracy than a compass.

Features:

• POLAR SCOPE ALIGNMENT
The app calculates the precise position of Polaris in the northern hemisphere or Sigma Octantis in the southern hemisphere inside your reticle in real time. Simply match what you see in the eyepiece to the on-screen display. Supports more than 35 reticle patterns covering virtually every mount from Sky-Watcher, iOptron, Celestron, Vixen, Losmandy, Orion, and many more.

• DAYTIME / NO POLAR SCOPE ALIGNMENT
The Daytime Alignment tool guides you to point your mount toward the celestial pole using your phone's sensors alone, no need for a polar scope. Use it day or night, it does not require a pole star.

• CAMERA AZIMUTH CALIBRATION
Reduce compass errors caused by metal or magnetic equipment. Centre the Sun, Moon, or a bright star in your phone camera and the app calibrates to an accurate azimuth heading. With the help of the gyro, the app will guide you to a more accurate phone-only alignment.

• BUBBLE LEVEL AND COMPASS
A precision bubble level and compass are built in, making it easier to level your tripod or mount before alignment. The compass also supports the camera azimuth calibration for high accuracy.

• XASTERIA ASTRO WEATHER FORECAST
Includes the Xasteria weather app, for multi-source (7Timer, MET.no, Apple Weather) configurable weather forecasts for amateur astronomers with cloud layers, seeing, transparency and more.

• NIGHT VISION DISPLAY
Choose red, green, or white display colour to help preserve dark adaptation.

• BOTH HEMISPHERES
Full support for northern and southern hemisphere observers.

• NO ADS, NO IN-APP PURCHASES
One-time purchase. Free updates for life.

• REQUIREMENTS
A gyroscope is required for accuracy in daytime alignment or bubble level tools. The app will try to use an accelerometer if no gyro is detected, but the results may not be great.