PolarAlign is used as a reference to help polar align an equatorial telescope mount that has a Polar Alignment scope. It is only intended to be a reference to the position of Polaris. It is not a teaching tool. Please Do Not Purchase this app unless you are an experienced amateur astronomer that needs a reference to the exact position of Polaris.

PolarAlign includes reticle for several Takahashi alignment scopes, the Astro-Physics RAPAS corrected right angle polar finder, a Sky-Watcher reticle and a generic general purpose reticle.

PolarAlign uses iPhone's Location Service to obtain your current latitude and longitude. They can be entered manually if needed.

The screen shows the position of Polaris if you are in the northern hemisphere or Sigma Octanis if you are in the southern hemisphere. It also displays your latitude, longitude, altitude and universal time, along with the local sidereal time (LST) and hour angle (H.A.) of Polaris.

The view can be zoomed by double tapping the screen. The PolarAlign generic reticle can be set to inverted, corrected, or right angle, to match the polar finder. Alternatively, three different Takahashi reticles or the Astro-Physics RAPAS reticle can be selected.

PolarAlign has an "augmented reality" capability which allows an iPhone to be mated to a polar finder scope, if you build a simple adapter.

What’s New

Version 6.6

Internal required upgrades.

Ratings and Reviews

2.8 out of 5
5 Ratings

5 Ratings

Scopeguy ,

Very useful, but could be better with a few tweaks

It would be great to add an option to display local time/date in addition to (or in place of) universal time. Also it would be great to add a retical selection for the Celestron Polar Finder.

747whaledriver ,

Nothing user-friendly or intuitive about this app

Fascinates me that people rate a program five stars without the slightest explanation, program guide, or tutorial of how it works? Did people learn this app using ESP? There is nothing about this app which is self-exclamatory, intuitive, or user-friendly. That there are a few years-old reviews (nothing more recent that 2 years old) should tell you how relevant or actively used this program is: it is a loser. Save your money, because this is useless.

The last update was eight months ago? Seriously?

cystokid5549 ,

Tremendous program!

I agree with the other 5 star reviewers. This program is very easy to use. The iPhone adapter to attach to the polar telescope is very easy to use. I have an Orion Atlas EQG mount and found that a 1.25" PVC pipe fits better than the 2" one called for. Also, I simply use rubber bands to hold the iPhone in place rather than the Velcro straps. Regardless, the program gives absolute unparalleled accuracy in polar alignment, far better than one can achieve by eyeball alone. A required program, as far as I am concerned. Orion and Celestron need to routinely supply this program and an adapter with each mount purchase. This is probably the best astro program I have ever purchased! The author responded almost immediately to update a few things when iOS 8 came out!


george Varros
5.7 MB

Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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