PolarAligner Pro (Astro Tool)

by Kechkoindustries · Tools · $3.99

On Google Play since May 2017 · Data updated 2026-10-04

Google Play

PolarAligner Pro (Astro Tool) is made and published by Kechkoindustries. AppBrain is an independent app data site and isn't affiliated with Kechkoindustries. The app name, icon, screenshots and description belong to Kechkoindustries and are shown as published on Google Play.

AppBrain's verdict

Established

Total installs: 22 thousand
Rating on Google Play: 3.33; 244 ratings
Last updated: April 19, 2026

PolarAligner Pro (Astro Tool) has 22 thousand installs. Users are divided: 3.3 stars from 244 ratings.

Summary

PolarAligner Pro (Astro Tool) provides spirit-level leveling, north alignment with compass, and GPS-powered Polaris tracking for equatorial telescope mounts. It also includes drift-alignment calculations and offline true-north declination, making it a comprehensive toolkit for both hemispheres.

Pros & Cons

Offline declination calculation for True North
GPS-based Polaris positioning and Hour Angle
Drift-Alignment calculator improves mount accuracy
Broad scope-brand support for popular polar scopes

Device sensor dependence: compass and tilt quality affect performance
Scope coverage may not include every brand—user requests welcomed
Requires location and storage permissions that may raise privacy expectations

Installs

Tracked by AppBrain

Last 30 days: 200
Play install range: 10+ thousand
Launched: May 2017

Installs over time

PolarAligner Pro (Astro Tool) has been installed 22 thousand times. Over the past 30 days, it has been installed 200 times.

Rankings

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Google Play Rankings for PolarAligner Pro (Astro Tool)

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Competitors

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Alternatives to PolarAligner Pro (Astro Tool)

Releases

Updates seen on Google Play

Version: 8.6
Launched: May 2017

Apr 19, 2026UpdateVersion 8.6
Apr 7, 2026UpdateVersion 8.5
Nov 1, 2025UpdateVersion 8.3
Apr 13, 2025UpdateVersion 8.1
Apr 6, 2025UpdateVersion 8.0

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User feedback

Ratings and reviews on Google Play

Google Play Rating history and histogram

110

Comments on PolarAligner Pro (Astro Tool) for Android

★★★★★ 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.

★★★★★ Gerald S · May 30, 2026

Have an older C8 with an out of date polar alignment finder scope. Even though the illuminated circles in the finder are no longer accurate for this time period I can still estimate the close enough to keep the scope tracking for viewing. Will need a more accurate finder for photography, but then I would just end up with Elon streaks across the image

★★★★★ Peter Zalabai · Mar 17, 2021

Using it to align the mount to the North, and it's amazingly accurate on a Huawei P20 Pro. The GUI is really basic but that's okay as what it does is more important. I use it together with a polar scope but sometimes when I can't use the scope only this app gives very good results. I got fairly low amount of trailing with only the app on a 400 mm lens. The key thing is let it stand a while to get more accurate GPS alignment and keep your phone away from metal surfaces.

★★★★★ neil holt · Apr 11, 2020

Great tool it does everything in one app the day time polar alignment is about a deg out. But that's still really good if you set up daytime when night falls and polaris is visible in the sky It's always in polar scope so just a minor adjustment needed I use the daytime polar align to place my tripod north leg I find it better than the compass The more I use it the better I find it Great job guys

★★☆☆☆ Geoff C · May 2, 2019

Not as easy as expected. I was hoping to complete polar alignment during the day. It correctly assigns correct lat/long. I know my mount isn't that far off correct, just needed a bit more adjustment. The daytime align window provides a red circle and large white cross. The cross is almost off the top of the phone window, how am I supposed to center in the circle. To do so would give a weird parking position. Edit. As I bought this on the premise it could offer a help in daytime alignment, 2 *.

★☆☆☆☆ 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.

Technology

Found in the app by AppBrain

Ads: No ads
Price: $3.99
Libraries: 18
App size: 8.30 MB
Needs Android: 2.1+
Content rating: Everyone

Technologies used by PolarAligner Pro (Astro Tool)

6 permissions · 18 libraries

Subscribe to see full permission and library details

Trust & Safety: The app requests location (coarse and fine), Internet, and Read External Storage to provide GPS data, online features, and local data storage. Users should be aware that some features rely on device hardware sensors (compass/tilt), which may affect performance on devices without those sensors.

About the app and developer

About PolarAligner Pro (Astro Tool)

PolarAligner Pro (Astro Tool) is a tools app developed by Kechkoindustries.

Install Statistics

PolarAligner Pro (Astro Tool) has been downloaded 22 thousand times. In the last 30 days, the app was downloaded 200 times.

User Ratings

PolarAligner Pro (Astro Tool) is rated 3.33 out of 5 stars. The rating is based on 240 ratings.

App Information

PolarAligner Pro (Astro Tool) costs $3.99. The APK size is 8.30 MB. The latest APK 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 since May 2017.

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Developer information for Kechkoindustries

Kechkoindustries

kechkoindustries@gmail.com

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Store listing

By Kechkoindustries, from Google Play

“The Polar-Aligner is a great tool to align your equatorial telescope mount”

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Screenshots by Kechkoindustries, from the Google Play listing

Description by Kechkoindustries Written by the developer, not by AppBrain. Click to read.

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.

-Compass sensor
-Tilt sensor
-GPS

manual:
https://www.kechkoindustries.de/polaraligner-pro

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

If you miss a scope, write us!

Recent changes:
show GPS coordinates in "EyeView"

Day alignment in two views
Scope adjusted

Official page on Google Play

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