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), allowing a quick and accurate polar alignment. It is one of the few programs that are accurate even 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 the website). It will even allow you to correct a centering error of the reticle - very useful for polar scopes that are not easy to adjust (e.g. iOptron ZEQ25). In the settings you can also select from a collection of reticles, one that matches your own - currently iOptron, Astro-Physics, Takahashi, Orion, Skywatcher, Celestron, Meade, Vixen, Bresser, Astrotrac, Losmandy, Kenko, Explore Scientific, Avalon Instruments, Konus, Tuthill, Telrad reticles are available. Feel free to contact the developer with any questions, feature requests, extra reticle requests and any problems you have with the app. If you like Polar Scope Align, please consider leaving a review on the app store.
-Accurate Polaris / σ Oct position calculation, including atmospheric refraction, stellar aberration, nutation.
-Calculation and correction/compensation for off-center reticles.
-Supports a multitude of polar scopes: iOptron, Astro-Physics RAPAS, 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, a couple for Astrotrac / Losmandy / Kenko / Avalon, the Vixen Atlux/SX/SXD/SXP/AXD/GP/GP-DX/Polarie Polar Axis Scopes, a Konus and several Polar Finders: Tuthill, Explore Scientific 8x50, Meade 9x60, Vixen Polaris, Celestron 7x50.
-Remember zero position on Celestron / Skywatcher / Orion etc reticles.
-Full app in red-color night mode.
-Messier, Caldwell and Bright star database.
-6 calculators useful for observing and astrophotography.
This free version is ad-supported. You can also try the ad-free Pro version with the following extra features:
-Ability to manually enter time/date and location (including saving favorites, list of recent locations, loading from world location database, searching online).
-Zoomable reticle view.
-Alt-az alignment error display for mounts that calculate it after star alignment (e.g. iOptron iEQ45, CEM60).
-Polar alignment when your scope is not in zero position (for mounts on which you can always access the polar scope).
-Lunar Calendar with solar/lunar rise/set and twilight times.
-Approximate daytime / no polarscope polar alignment tool. Great for solar imaging (including eclipses).
-Bubble level (using either gyro or accelerometer) and Compass heading, as well as magnetic declination reading.
-GPS accuracy & elevation data.
-Red/White/LED light control.
-Deep Space Object Database with 13000+ objects from several catalogs (Messier, Caldwell, NGC, IC, Herschell 400, Sharpless 2). The database is searchable and fully configurable with filters, various sorting methods etc.
-Over 20 calculators useful for observing and astrophotography, from eyepiece magnification and field of view, to imaging resolution and reducers.
-World astro-weather report based on 7Timer! data.
-Access to the latest water vapor satellite images.
-List of visible ISS passes and Iridium flares.
-iOptron Named Star list, Meade LX200 star list.
-Screen dimming slider.
The app is updated regularly with new features. From version 3.5, upgrades of the app to a new version will anonymously share (just once) the iOS version, reticle and tools used, so that I can focus development appropriately. The main reason for this is that while I intend to keep support for iOS 7/8 devices for as long as I am allowed, even for very few users, it adds an overhead so I have to make sure it is really needed.
Why not help out by rating or reviewing after trying the new version. I never add popups in the app to ask you (annoying!), which results to less reviews than other apps. Here's what's new:
- Covington Grid Method for Polaris circle reticles.
Ratings and Reviews
Best Polar Alignment App
When I found out that the recent solar eclipse was not going to be total at my observatory, I had to shoot closer to my home. I used this app to align my old C8 the night before (with no polar scope). It was so accurate that it kept the sun centered for over 5 hours. I then discovered that it had a reticle for my G11 Gemini permanently mounted at my observatory. Now it's aligned better than I was able to get by drift aligning. Works great on my iPad too. Thanks for a great and useful app. Steve Foster
I have a sky adventurer mount and the reticle for this mount is included in this app. After aligning using this app, I was able to take 2 minute pics with a 300mm lens with pinpoint stars. This app is very accurate. It also has instructions to help you align your polar scope to make your setup accurate.
Not only does this app help me align my Skywatcher Star Adventurer motorized mount, but it also has a very accurate clock with seconds (which is lacking in the default iOS clock). This is essential to time ISS transits of the moon & sun...so glad it also has this feature! Keep up the good work.
With Family Sharing set up, up to six family members can use this app.