Zoomable reticle view and customized routines & tools: Alt-az alignment error display for mounts that calculate it after star alignment (e.g. Wizard to calculate your reticle centering offset and correct or compensate for it. Moon phase & lunar Calendar with solar/lunar rise/set and twilight times. List of visible ISS and bright satellite passes. World astro-weather report based on data from 7Timer!, Dark Sky and more. Over 30 calculators useful for observing and astrophotography, from eyepiece magnification and field of view, to imaging resolution and reducers. Connect to and control WiFi-enabled iOptron mounts. Search, apply filters, sorting, download DSS color images for all items, or get help finding them with your non-goto telescope with the Push-To function. Deep Space Object (DSO) Database with 22000+ objects from several catalogs (Messier, Caldwell, NGC, IC, Herschell 400, Sharpless 2, Barnard), along with stars (Yale Bright Star) & planets. Full app in red-color (or alternative green, white) night mode - tools switchable to daytime view. Laser / Hop Align for nighttime alignment using a calibration star for obstructed or not visible polar star, or for improving laser align. Now with sun shadow calibration for more accuracy! eclipses) and even limited short focal length astrophotography. Great for visual use, solar imaging (inc. Approximate daytime / no polarscope polar alignment tool.
Use device time/date/location, or enter your own, or pick from online & offline world databases via the Location Manager. Most other apps do not perform precision calculations, so please only compare app readings to accurate sources (USNO etc). Accurate calculation of Polaris or Sigma Oct for any date and location, including effect of atmospheric refraction (and annual aberration, nutation).
Graphic & Text display of polar alignment.
The Pro Watch version has all the features of Polar Scope Align Pro, with the addition of an Apple Watch app featuring: PoleMaster help view for South Hemisphere users. IOptron old & new, Astro-Physics RAPAS & PASILL, various versions of Takahashi EM-10/11/200/400/500, NJP, PM-1, P2-Z, the latest Orion / Skywatcher, the Classic Skywatcher / Orion / Celestron / Meade / EXOS2 / Bresser, the Telrad, Rigel QuikFinder, a couple for Astrotrac / Losmandy / Kenko / Avalon, the Vixen PF-L/Atlux/SX/SXD/SXP/AXD/GP/GP-DX/Polarie Polar Axis Scopes, a Konus and several Polar Finders: Tuthill, Explore Scientific 8x50, Meade 9圆0, Vixen Polaris, Celestron 7x50, Carton Optical. In the settings you can select the polar scope reticle that matches your own, from a vast collection:
It is one of the few programs that are accurate in lower latitudes by correcting for atmospheric refraction (so expect results to agree only with precise software and not most simplistic "polar align" apps - see the "Accuracy" section in help for details). Polar Scope Align will calculate the position of Polaris or σ Octantis in your Polar Scope reticle for your location (using your phone's GPS or manually), allowing a quick and accurate polar alignment.
Remember, all features & updates are free forever, the only in-app purchases are donations (tip jar). Apart from the most reliable app for polar alignment (with or without a polar scope), PS Align pro has become the astronomer's swiss-army knife with all the tools added over the years.