Comparison

Polar Scope Align vs MIRROSKY

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Polar Scope Align

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.

Highlights
  • 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
Features
Read full description

Polar Scope Align is a free, ad-supported polar alignment app for iPhone and iPad. It calculates the position of Polaris or σ Octantis in your polar scope reticle for your location, date and time, helping you get a quick and accurate polar alignment with an equatorial mount. POLAR SCOPE ALIGNMENT • Accurate Polaris and Sigma Octantis position for your date and location • Atmospheric refraction correction for better accuracy, especially at lower latitudes - readings may differ slightly from simpler apps that skip this correction, but will agree with precise sources (USNO, scientific software) • Automatic time and location • Manual location support • Reticle centering-error measurement and correction • Zero-position help for common Celestron / Sky-Watcher / Orion style reticles • Full red night-mode interface SUPPORTED RETICLES Polar Scope Align supports 35+ polar scope and finder reticle types, including: iOptron, Astro-Physics RAPAS & PASILL, Takahashi (EM-10/11/200/400/500, NJP, PM-1, P2-Z), Sky-Watcher / Orion (including EQ6/AZ-EQ and Star Adventurer), Celestron, Meade, EXOS2, Bresser, Vixen (Atlux/SX/SXD/SXP/AXD/GP/GP-DX, Polarie), Astrotrac, Losmandy, Kenko, Avalon, Konus, Telrad, Rigel QuikFinder, and several older polar finders (Tuthill, Explore Scientific, Meade 9x60, Vixen Polaris, Celestron 7x50, Carton Optical). OBSERVING TOOLS The free version also includes: • Moon phase • Messier, Caldwell and bright-star database • DSS image downloads for included database objects • Saved, editable and printable DSO lists • 8 astronomy calculators for observing and imaging • Sample Pro tools available from Settings, including aurora forecast • iOptron WiFi Connect - report mount status, set mount Time/Date/Location LOOKING FOR ALIGNMENT WITHOUT A POLAR SCOPE? Polar Scope Align Pro adds the advanced tools many users search for: • Daytime / No Polar Scope Alignment • Camera Azimuth Calibration using the Sun, Moon, planets or bright stars • Laser / Hop Align for night alignment when Polaris is blocked • Push To / manual GoTo for non-GoTo telescopes • Live sky maps for Daytime Alignment, Laser / Hop Align, Push To and Hop To • Full 22,000+ object DSO database • Xasteria astro weather, aurora, satellite passes and widgets • 30+ calculators • Bubble level, compass and iOptron WiFi mount control • Apple Watch companion app • No ads If you only need accurate polar-scope alignment, this free version is a capable tool. If you want alignment without a polar scope, observing planning, weather and field tools, Pro is the complete version.

About

MIRROSKY

Explore the cosmos with an AI-powered astronomical telescope and app. Discover stars, planets, and galaxies with real-time data, 3D maps, and interactive learning. Ideal for aspiring astronomers and curious minds.

Highlights
  • AI star recognition
  • 3D star map
  • Interactive interface
  • Intelligent star-seeking
  • Sharable challenge projects
  • Professional astronomy courses
  • Preset sky browsing routes
Features
Read full description

Recognizing the Universe, Start the journey of exploration and discovery, develop the desire Once human beings have wisdom, we are full of curiosity about the starry sky. Mirroksy focus on the exploration of stars, embedded AI star recognition algorithm and high-precision IMU sensor, to manufacture the fully digital astronomical telescope which operate without manual intervention. It brings us a different experience of observing stars, AR star-seeking; Co-working with the full-digital astronomical telescope, our APP recommends the latest astronomical information according to the user's location and timing, it plans an optimum star-watching route to quickly explore the universe. Mirroksy has cooperated with many astronomical research institutes, collected various interesting astronomical contents, advocated gradual learning and exploratory learning mode, aiming at helping students and newly-introduced astronomers to understand astronomical knowledge comprehensively, and initiated a journey of discovery guided by interest! 【Real-time View】: Real-time display for the status of the stars and synchronization of Astral body. 【3-D Star Map】: Stars, planets in the solar system and deep space of the Galaxy can be observed. 【Interactive Main Interface】: Simple UI design, smooth interface switching, randomly choice of multiple functions, bring unusual visual experience. 【Intelligent Star-Seeking Interface】 : Mirroksy astronomical telescope has built-in IMU sensor Array (GPS, accelerometer, magnetometer and gyroscope), which combines with the star recognition algorithm developed by Mirroksy to achieve high-precision calibration system and fast positioning of target stars. 【Sharable Challenge Project】: Multiple users can interact with each other on-line at the same time. Focusing on the Interest and Interaction of Star Watching, henceforth let’s say goodbye to the boring stargazing Tour. 【Professional Course】: The course is edited by International Authoritative Astronomers, Users of Junior, Middle and Advanced can learn according to their own knowledge of the stars, and gradually enter the palace of science, becoming astronomical masters. 【Preset Sky Browsing Route】: App has built-in Sky Browsing Route, assists users to observe stars, has the best experience of watching stars, and the routes are constantly updated. 【Family Experience】: Children can learn the knowledge of the stars together with Parents, and experience the happy time with the whole family. Recognizing the Universe, Start the journey of exploration and discovery, develop the desire for discovery and knowledge, our Miraculous Discovery Journey is getting started! for discovery and knowledge, our Miraculous Discovery Journey is getting started!

Screenshots

Polar Scope Align4 screens
MIRROSKY4 screens

Verdict

The call

The clearest difference is rating: Polar Scope Align at 4.7 against MIRROSKY's 3.0. Polar Scope Align also leads on ratings volume (171 vs 2). MIRROSKY's advantage is in-app purchases (none vs 3) and ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Polar Scope Align sells 3 one-off in-app purchases. MIRROSKY asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Polar Scope Align holds the better App Store score, 4.7 against 3.0. That said, the two scores are not equally well evidenced: Polar Scope Align has 171 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Polar Scope Align ships an update every 2 months, MIRROSKY every 10 days. The most recent releases landed on September 26, 2026 and September 12, 2026 respectively.

Scorecard6 real differences · 4 level
Polar Scope Align versus MIRROSKY: the parameters behind the verdict, then further details
ParameterPolar Scope AlignMIRROSKY
PriceFreeFree
Rating4.7 (171 ratings) — better3.0 (2 ratings)
Positive reviews91.3% of reviews—
Number of ratings171 — better2
Update frequencyEvery 2 monthsEvery 10 days — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.012.0 — better
Further details — not scored
Size23 MB287 MB
Age rating4+17+
DeveloperDimitrios KechagiasMirrosky

Customer experience

Polar Scope Align

All ratings171 ratings
Positive92.4%
Neutral0.6%
Negative7.0%
Written reviews173 reviews
Positive91.3%
Neutral1.7%
Negative6.9%

MIRROSKY

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%

Bugs and requests

Polar Scope Align

Reported bugs

6 issues
  • Date and time dial do not match correctly
  • GMT and LST times appear to be switched
  • App crashes or fails to initialize for some users
  • Alignment accuracy varies inconsistently between sessions
  • Location detection issues with cell tower vs GPS
Show 1 more
  • Reticle display not rendering properly in some cases

Requested features

7 requests
  • Online video tutorials demonstrating all features
  • Remove or reduce center dot size in reticle
  • Larger, bolder font options for better readability
  • Brighter star options for southern hemisphere alignment
  • Smaller ad button or ad customization
Show 2 more
  • Better beginner onboarding and instructions
  • More robust alternative alignment methods for southern hemisphere

MIRROSKY

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

Polar Scope Align

One-time3
  • Tip 1x$0.99
  • Tip 4x$3.99
  • Tip 10x$9.99
None

MIRROSKY

No in-app purchases

Questions

Is Polar Scope Align free?
Polar Scope Align is free to download, with in-app purchases available.
Is MIRROSKY free?
MIRROSKY is free to download, with no in-app purchases.
Which has better reviews, Polar Scope Align or MIRROSKY?
Polar Scope Align is rated higher. Polar Scope Align averages 4.7 out of 5 from 171 ratings, while MIRROSKY averages 3.0 from 2 ratings.
Do Polar Scope Align or MIRROSKY have ads?
Polar Scope Align shows ads; MIRROSKY does not.
Which is updated more often, Polar Scope Align or MIRROSKY?
Polar Scope Align ships an update every 2 months, and MIRROSKY every 10 days. Most recently, Polar Scope Align was updated on September 26, 2026 and MIRROSKY on September 12, 2026.

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