The Polar-Aligner is a great tool to align your equatorial telescope mount
About PolarAligner Pro (Astro Tool)
PolarAligner Pro (Astro Tool) is a tools app developed by Kechkoindustries.
Download Statistics
PolarAligner Pro (Astro Tool) has been downloaded 22 thousand times. In the last 30 days, the app was downloaded 230 times. It is ranked in the top 100 tools apps.
User Ratings
PolarAligner Pro (Astro Tool) is rated 3.38 out of 5 stars. The rating is based on 240 ratings.
App Information
PolarAligner Pro (Astro Tool) costs $3.99 to download. The APK download size is 8.30 MB. The latest version available is 8.6. The last update was on April 19, 2026.
Technical Requirements
PolarAligner Pro (Astro Tool) requires Android 2.1+ or higher. The app has a content rating of Everyone. The app has been available on Google Play May 2017.
Description
Attention: Unfortunately, the app keeps getting bad reviews because the compass or spirit level doesn't work. This is then because the device does not have a compass sensor or a tilt sensor. An understanding from the buyer is very rare. A refund is of course possible. So please convince yourself before buying whether your device has the following sensors.
The Polar-Aligner is a simple astronomical application for the northern and southern hemisphere to help you to align your mount easily. It includes basic tools for leveling your equatorial mount (spirit level) and to adjust it to north (compass).
Choose the Settings for the conpass. -magnetic North -manual declination for True North -automatic declination for True North (offline calculation, no Internet needed)
You can calibrate your spirit level with a real spiritlevel and have the highest accuracy for a smartphone.
The daylight alignment is included for north and south hemisphere.
The GPS gives you the most accurate information about your location with the altitude and calculate the position of Polaris and show you graphically the Polaris position, the Hourangle, exact location ....
You get also information about Drift-Alignment. The tool helps you to get the right direction for the alignment. With the calculator, you can get the calculated result to align your mount with a small error.
There are many Polarscopes for: IOptron Meade Orion Sky Adventurer Skywatcher Astrophysics Takahashi Bresser Vixen Celestron
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Comments on PolarAligner Pro (Astro Tool) for Android
★★★★★Karl Moretz· Aug 26, 2020
I don't have a clear view of Polaris from my house, and using the beta feature day align seems to work really well. Using it, I can easily get tracked exposures of a minute without star trails. About as good as I could ask for without an actual polar alignment. The other features work well, pretty much all you should need to achieve alignment. One small gripe would be that the UI is not the slickest, but it does what it advertises well. Checked against an actual compass, and it was spot on.
★★★★★Alex McLean· Feb 8, 2021
A good app for me. I have to set up my mount every time I use it. I have no polar scope, but the daytime alignment is extremely well-thought-out. Once I set up my mount, I just put smartphone in my homemade holder and center the crosshairs. On a good sky I recheck it, and it is impressed with its accuracy. One niggle was I only found the instructions by accident, a link would be good.
★★★★★Jason Karoos· Jan 25, 2026
Trying to polar align my telescope in the Southern Hemisphere was a nightmare. This app solved everything. Press a button and boom. Instant alignment. Just attach the phone to the mount and line up the cross that simple. Worth every penny. Edit: I just read from the Dev that people are giving this a bad review because the compass don't work? As they mentioned this is because your phone is junk and hasn't got the built-in functions needed for this app. Go by my review people. This app is gold!!
★☆☆☆☆Jim Buckman· Dec 27, 2021
I am using this app on a Samsung Galaxy S20 Ultra. The S20 has a built-in compass that is very accurate. I also have a Garmin GPS digital compass that points to exactly the same north that the compass built into my phone does. This app's compass is at least 15° off and is obviously not accessing the built-in compass on my phone. How about either fixing your app and add in all the neat stuff found in the iPhone version. Very, very disappointed.
★★☆☆☆Dilip Sharan· Jul 11, 2019
Reasonable functionality. But freezes when trying daytime Polar Alignment with my Huawei P20 pro mobile phone
Google Play Rankings for PolarAligner Pro (Astro Tool)
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