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Android Apps > Tools > PolarFinder Pro
PolarFinder Pro icon

PolarFinder Pro

2.5.5
Raffaele Lunari
4.53
361 reviews
10,000+
Downloads
$3.99

Application required to perform precise night polar alignment.

PolarFinder Pro Screenshot 1 of 9
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PolarFinder Pro Screenshot 9 of 9
Screenshots by Raffaele Lunari, from the Google Play listing
View on Google Play

AppBrain's verdict

EstablishedLoved by users
Rating on Google Play
4.53
361 ratings
Installs
18 thousand
Last updated
February 1, 2026
Ads
No ads
Size
2.03 MB

PolarFinder Pro has 18 thousand installs. Users love it: 4.5 stars from 361 ratings.

Official page on Google Play

Summary

PolarFinder Pro delivers precise night-polar alignment for astrophotography by combining manual coordinate entry, multiple reticles, and precession-aware position calculations for both hemispheres. It offers view inversion and field-friendly display options to simplify telescope setup in darkness, with notable regional recognition in Germany, the US, and France. The app has a solid footprint with 10,000+ total downloads and 160 downloads in the last 30 days across its market presence.

Pros & Cons

  • Precise polar alignment using precession-aware calculations
  • Supports both hemispheres for universal applicability
  • Offers multiple reticles for different telescope brands
  • Manual coordinate/date entry without GPS for field flexibility
  • Lacks satellite/sky-tracking features emphasized by some competitors
  • Requires visibility of the Polar star and polar scope to use effectively, which may limit applicability in some environments

User feedback

Ratings and reviews on Google Play

Comments on PolarFinder Pro for Android

★★★★★ Rob Schwarze · Sep 28, 2025
Great help every time I assemble and align my telescope equipment. It displays my gps location, time details, and a helpful reticle to polar alignment correctly.
★★★★★ D. A. Ackerman · Feb 5, 2021
Polar Finder Pro quickly locks to GPS and uses time to do exactly what you expect, giving polar alignment instantly. Options to change reticle, invert view to match polar scope and insert location distinguish this app. Simply, it does what you want.
★★★★★ Zane Ross · Jun 19, 2024
Gives me my GPS location and makes polar alignment with the iOptron Sky guider Pro very simple.
★☆☆☆☆ Christopher Erickson · Jan 19, 2021
Useless app. Not useful with polar scopes from Astrophysics and several others. My review is precise and accurate.
★★☆☆☆ Oisín Dorgan · Apr 18, 2020
This was the first app I used for polar alignment. For 2 nights I couldn't get correctly polar aligned and blamed myself and my setup. 3rd night I downloaded a 2nd app to compare polaris' position with, and it was a solid 5' off even though time, date and coordinates were identical. Was able to polar align successfully with the other app. I uninstalled immediately after.
★☆☆☆☆ rowan tuuta · Jan 21, 2021
Pretty much useless in the Southern Hemisphere. Just like all polar finders. Can't change redical type etc. etc . Must only have telescopes in the Northern Hemisphere I reckon
★☆☆☆☆ Behind The Lens · Nov 24, 2021
This app was rs 460 in my country, I was charged 110 rupees more than the cost, I demand the developers to refund me the extra amoun.

Google Play Rating history and histogram

290
39
6
0
27

Store listing

By Raffaele Lunari, from Google Play
Description by Raffaele Lunari Written by the developer, not by AppBrain. Click to read.
This application allows you to make a precise stationing of the mount, excellent especially for astrophotographers and it works in both celestial poles.
In the settings you can choose to exclude the GPS and enter the customized coordinates and / or even a particular date and time in order to know the exact position of the Polaris (northern hemisphere) or Sigma Octantis (southern hemisphere) for a certain place.
This feature is also useful to know the peak of the polar for a specific place directly in the field without having to resort to third applications.
Once the position has been calculated, the polar image will be shown exactly as it should be set in the polar telescope, remembering that it inverts the images (the app also allows real vision).

ATTENTION: To use this app you need to see the Polar star and have a polar scope.

Main features of the app:

1. Possibility to manually enter coordinates,
date and time excluding
the gps;
2. Various reticles available:
- PolarFinder;
- Skywatcher (old and new);
- Ioptron;
- Bresser;
- Astro-Physics;
- Takahashi;
3. Works in both hemispheres;
4. Possibility of activating/deactivating the
view through the polar telescope (inverts
the images);
5. Possibility of activating/deactivating the "Full Screen" view;
6. Possibility of activating/deactivating the "Super Dark" view;
7. Position of the Polaris or of the Octant very
accurate thanks to the
calculation of the phenomenon of the
Precession;
8. Altimeter;
9. Very accurate help

PLEASE NOTE:
This app unlike most apps of its kind, takes into account the phenomenon of the Earth's Precession.
The Earth has a rather complex movement, one of them is called the Precession where the rotational axis of Earths slowly changes its orientation and the celestial poles are slowly changing with it. This movement is rather small, around 26,000 years per revolution, but in time it changes the apparent position of celestial objects. As the right-ascension coordinate is used when calculating the hour angle, it is important to consider the effects of precession on the RA coordinate.
For any problems, clarifications, suggestions or suggestions for improvement, write to me. I am at your complete disposal thanks and ...
Clear Skies!

Recent changes:
Edge‑to‑edge mode handling and support for Android 16

Safety and technology

Found in the app by AppBrain
Ads
No ads
Price
$3.99
Libraries
4
App size
2.03 MB
Needs Android
4.1+
Content rating
Everyone

Technologies used by PolarFinder Pro

4 permissions · 4 libraries
Subscribe to see full permission and library details
Trust & Safety: Requires location permissions (ACCESS_COARSE_LOCATION and ACCESS_FINE_LOCATION) and license verification (CHECK_LICENSE). Includes a DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION. The app notes reliance on observing the Polar star and, in some cases, a polar scope for proper use; users should ensure compliance with license terms and provide appropriate permissions.

Releases

Updates seen on Google Play
Version
2.5.5
Launched
September 2019
  • Feb 1, 2026UpdateVersion 2.5.5
  • Jan 10, 2026UpdateVersion 2.5.5
  • Jul 28, 2025UpdateVersion 2.5.4
  • Jul 5, 2025UpdateVersion 2.5.3
  • Mar 23, 2024UpdateVersion 2.5.2
Show all changes Show fewer

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Installs

Tracked by AppBrain
Last 30 days
160
Play install range
10+ thousand
Launched
September 2019

Installs over time

PolarFinder Pro has been installed 18 thousand times. Over the past 30 days, it has been installed 160 times.

Rankings

Google Play top charts

Google Play Rankings for PolarFinder Pro

This app is not ranked

About the app and developer

About PolarFinder Pro

PolarFinder Pro is a tools app developed by Raffaele Lunari.

Install Statistics

PolarFinder Pro has been installed 18 thousand times. In the last 30 days, the app was installed 160 times.

User Ratings

PolarFinder Pro is rated 4.53 out of 5 stars. The rating is based on 360 ratings.

App Information

PolarFinder Pro costs $3.99. The app size is 2.03 MB. The latest version available is 2.5.5. The last update was on February 1, 2026.

Technical Requirements

PolarFinder Pro requires Android 4.1+ or higher. The app has a content rating of Everyone. The app has been available on Google Play since September 2019.

PolarFinder Pro is made and published by Raffaele Lunari. AppBrain is an independent app data site and isn't affiliated with Raffaele Lunari. The app name, icon, screenshots and description belong to Raffaele Lunari and are shown as published on Google Play.

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Developer information for Raffaele Lunari

Raffaele Lunari

suppor565@gmail.com

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