This app provides precise polar alignment for telescopes, with or without a polar scope. It includes a comprehensive suite of astronomical tools, such as a DSO database, calculators, and mount control. An accompanying watch app offers real-time alignment data and weather information.
7.0
July 5, 2026
Version 7 brings improved daytime alignment and many more tools and features: • Camera Azimuth Calibration added for Daytime / No Polar Scope alignment, using the Sun, Moon, planets or bright stars for higher accuracy instead of relying on the compass. • Improved Daytime Alignment, Laser / Hop Align, and Push To compass/magnetometer handling. • Phone mounting orientation options added for alignment and Push To tools. • Sky maps added to Push To, Hop To, Laser / Hop Align, and Daytime Alignment. • DSO Database lists can be saved, edited by swiping, and printed. • Xasteria updates: Widgets available (weather, satellite pass and aurora), OpenWeather forecast, aurora forecast map, improved weather display with sun/moon altitude arcs, in-app satellite trajectories, and updated light pollution map. • Watch app rewritten for improved reliability, with selectable weather source and more responsive tools. • Bubble Level adds incline/slope percentage mode and Camera Az calibration support. • Auto Night Mode added. • New onboarding screens and improved help, especially for daytime calibration. • Magnetic declination calculation restored. • Various small fixes, including settings screen and iOS 26 compatibility updates. Remember, the app never nags you with popups, so it gets very few ratings/reviews. Support it by rating it!
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This app helps you achieve precise polar alignment for your telescope, crucial for long-exposure astrophotography. It calculates the correct position for alignment stars based on your location and date. The app also offers a wide range of astronomical tools and a companion watch app for convenient access to data.
Key features include accurate polar alignment calculations, support for various polar scope reticles, daytime alignment tools, a comprehensive Deep Space Object database, over 30 astronomical calculators, and Wi-Fi control for iOptron mounts. The Pro Watch version adds real-time alignment display, weather, and a bubble level to your Apple Watch.
The app itself is free to download and use, with all features and updates provided at no additional cost. The only in-app purchases available are voluntary donations to support the developer.
The main application is designed for iOS devices. The Pro Watch version specifically includes an Apple Watch app, indicating compatibility with Apple Watch devices paired with compatible iPhones.
Enter your location (via GPS or manually) and the current date and time. The app will then display the position of the celestial pole within your polar scope's reticle. You can select your specific polar scope model from a large list for the most accurate overlay. The app also offers alternative alignment methods for situations where a polar scope is not usable.
