Polar Scope Align

Polar Scope Align

Telescope Polar alignment

173 ratings
174 reviews
Free
In-App PurchasesWith Ads

Details

Released
March 4, 2015
Updated
October 23, 2026

Features

Polar Scope Align screenshot #1 for iPhone
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Polar Scope Align screenshot #10 for iPhone
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About

This app calculates the precise position of celestial poles in your telescope's polar scope reticle for accurate alignment. It supports a wide range of reticles and corrects for atmospheric refraction, offering precision even at lower latitudes. Features include night mode, moon phase, and astronomical databases.

✓Polaris/Sigma Octantis position calculation
✓Atmospheric refraction correction
✓Reticle centering error correction
✓Supports numerous reticle types
✓Red-color night mode
✓Moon phase and astronomical databases
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What users say about Polar Scope Align

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+1

What's New in Polar Scope Align

7.3

October 23, 2026

• Major DSO Database update: ◦ Redesigned object details show distance from the Moon, mark objects below the horizon and update automatically. ◦ Altitude charts can show the Moon and the time an object spends at a useful altitude in darkness. Tap or drag to inspect another time. ◦ Mark objects as observed, add notes, copy details and share charts. Notes can be printed, exported as text or CSV, and backed up for import. ◦ Sort by rise, set or transit time, or by time above a useful altitude, directly from the object list. A quick rating or review on the App Store is always appreciated. For suggestions or feedback: http://astro.ecuadors.net

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3

Subscriptions & In-App Purchases

$0.99

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User reviews

Très utile

simple et efficace.
dommage que les bandeaux de pub en bas ne soient pas en mode nuit .

Excellent

Maybe it’s time for a name change for this app. I don’t use a polar scope any more - it’s indispensable for that - but the app is still very useful because over the years the developer has added many features that go well beyond simply polar aligning and is still (September 2026) actively developing it. It’s one of the best astronomy apps available. Get it - you’ll be glad you did.
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Response from developer

You are right, hence I recently released Astro Tools, an app that has (or will have) every astronomy tool I can imagine (... except polar scopes). It already has things like digital finderscope, augmented reality planner, plate solving etc. PS Align / PS Align Pro will continue to be developed of course, but even I don't use a Polar Scope since a few months ago - my latest mount does not take one unfortunately...

Takahashi EM-11

Nice app. But there is no my mount in options. Takahashi EM-11 (with Temma2 Jr.).

Response from developer

Hello. Are you sure about that? The EM-11 should have what is listed as Takahashi 2000-2030 in the app. In any case, if you really have a polar scope that is not included, please contact me at astro.ecuadors.net and I can add it with your help!

A nice app

A very convenient app, I’d recommend it to any astrophotographer.

Skywatcher star adventure

GTI goto e propirtdc

Developer apps

User experience

🐞

Reported Bugs

6 issues

Date and time dial do not match correctly

Bug

GMT and LST times appear to be switched

Bug

App crashes or fails to initialize for some users

Bug

Alignment accuracy varies inconsistently between sessions

Bug

Location detection issues with cell tower vs GPS

Bug

Reticle display not rendering properly in some cases

Bug
✨

Requested Features

7 requests

Online video tutorials demonstrating all features

Feature

Remove or reduce center dot size in reticle

Feature

Larger, bolder font options for better readability

Feature

Brighter star options for southern hemisphere alignment

Feature

Smaller ad button or ad customization

Feature

Better beginner onboarding and instructions

Feature

More robust alternative alignment methods for southern hemisphere

Feature

FAQ

What does Polar Scope Align do?

Polar Scope Align calculates the exact position of Polaris or Sigma Octantis within your telescope's polar scope reticle. This allows for quick and accurate polar alignment of your telescope, crucial for astrophotography and precise viewing. It accounts for your specific location and atmospheric conditions for enhanced accuracy.

How accurate is the polar alignment with this app?

The app provides highly accurate polar alignment, especially at lower latitudes, by correcting for atmospheric refraction and other celestial effects. It aims for precision comparable to scientific software, distinguishing it from simpler alignment apps. The accuracy is detailed in the app's help section.

What is the cost of Polar Scope Align?

The app offers a free, ad-supported version with core polar alignment features. An optional ad-free Pro version is available for purchase, which includes additional advanced features like manual time/location entry, zoomable reticles, and daytime alignment tools.

What types of telescope reticles are supported?

The app supports a vast collection of reticles from various manufacturers, including iOptron, Astro-Physics, Takahashi, Orion, Skywatcher, Celestron, Meade, Vixen, and many more. Users can select the reticle that matches their specific polar scope.

Can this app help with alignment in the Southern Hemisphere?

Yes, the app provides assistance for Southern Hemisphere users by calculating the position of Sigma Octantis. It also includes a 'PoleMaster help view' specifically for South Hemisphere users to aid in their polar alignment process.