Comparison

Polar Scope Align Pro vs EclipseGo

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 Pro

This app assists astronomers with precise polar alignment for telescopes, offering tools for various reticles and low-latitude accuracy. It also includes a comprehensive suite of astro tools, from object databases to calculators and weather reports.

Highlights
  • Accurate polar alignment calculation
  • Support for numerous polar scope reticles
  • Daytime/no polarscope alignment tool
  • Deep Space Object database
  • Astrophotography calculators
  • World astro-weather report
Features
Currently charting
Read full description

Polar Scope Align Pro is a complete toolkit for amateur astronomers: accurate polar alignment, deep-sky observing, astro weather, push-to/manual GoTo, iOptron mount WiFi control, widgets and more. All features and updates are free forever. Optional in-app purchases are just tips to support development. POLAR ALIGNMENT • Calculates Polaris or σ Octantis position for 30+ reticle types: iOptron, Astro-Physics, Takahashi, Skywatcher, Vixen, Celestron, Orion, Astrotrac and others* • Atmospheric refraction correction for accuracy at any latitude • Works with or without a polar scope ALIGNMENT WITHOUT A POLAR SCOPE • Daytime / No Polar Scope Alignment: works day and night with just your phone's gyro • Camera Azimuth Calibration: use sun/moon/stars to calibrate gyro and align accurately without a compass, immune to magnetic interference • Laser / Hop Align: nighttime alignment for maximum accuracy with a laser or a scope with no view of Polaris • Live sky map guides you to the celestial pole in real time • Sun Finder helps you point your filtered telescope/telephoto to the Sun PUSH TO (MANUAL GOTO) • Attach your phone to any scope and convert it to manual/push GoTo • Select from a large database and use direct push or more accurate hop-to mode DEEP SKY OBJECT DATABASE • 22,000+ objects with altitude graphs, rise/set times and more info • Save and manage curated observing lists • Filter, search, sort and push to any target XASTERIA ASTRO WEATHER • Hourly astronomy forecasts from 7Timer, OpenWeather, MET Norway and Apple Weather, plus a configurable Multi-source forecast • Animated satellite Cloud Map with recent EUMETSAT and NASA infrared imagery • Aurora forecasts • ISS and bright satellite passes with an All Sky night chart, individual sky charts, live map tracking, and Tiangong and Hubble views • Solar eclipse tool with past and future eclipses, live mode with audio cues • Experimental eclipse camera for automated photoshoots of partial phase, diamond ring, Baily's beads, totality bracketing • Interactive light pollution map using World Atlas and recent VIIRS data CALCULATORS & TOOLS • 30+ calculators for observing and astrophotography • Moon phase calendar with altitude graphs • Solar eclipse calculator and simulator • Bubble level & Compass IOPTRON WIFI MOUNT CONTROL • Connect to WiFi-enabled iOptron mounts (HAE, HAZ, HEM, CEM, GEM and more) • Automatic date/time/location setup • Switch between Equatorial and Alt-Az on mounts that support both • Move & Sync: directional control with a live sky map • Point GoTo: aim your phone at a patch of sky and send the mount there • Current Point Query: find out what the mount is pointing at • GoTo any object from the DSO Database NIGHT-FRIENDLY • Red, green or white night mode with dimmer WIDGETS • Configurable Tonight and Multi astronomy weather forecasts • Upcoming bright satellite passes • Aurora probability, activity forecast and NOAA aurora map * Full list of supported reticles: Astro-Physics RAPAS & PASILL, iOptron, the latest Orion / Skywatcher, the Classic Skywatcher / Orion / Celestron / Meade / EXOS2 / Bresser / MSM, various versions of Takahashi EM-10/11/200/400/500, NJP, PM-1, P2-Z, the Telrad, Rigel QuikFinder, a couple for Astrotrac / Losmandy / Kenko / Avalon, the Vixen PF-L/Atlux/SX/SXD/SXP/AXD/GP/GP-DX/Polarie Polar Axis Scopes, a Konus and several Polar Finders: Tuthill, Explore Scientific 8x50, Meade 9x60, Vixen Polaris, Celestron 7x50, Carton Optical. PoleMaster help view for South Hemisphere users.

About

EclipseGo

This app helps you find and share details about the 2024 Total Eclipse for any location. It provides information on eclipse type, key timings, maximum coverage, and duration. An optional upgrade offers favoriting locations and a countdown timer.

Highlights
  • Eclipse type identification
  • Key moment timings
  • Max partial eclipse coverage
  • Total eclipse duration
  • Location sharing
  • Favorite locations (Pro)
  • Countdown timer (Pro)
Features
Read full description

EclipseGo is the easiest and quickest way to see and share the details of the 2026 Total Eclipse in Spain for any location on the map. Choose any point on the map to see: - If it is a total eclipse or a partial eclipse. - Time for the key moments - Max coverage for partial eclipse - How long the total eclipse will last There is also a built sharing to make it easy for others to see the details with a link to view the details in EclipseGo. You can also favorite points to make it easy to compare locations and get a handy countdown timer to each stage of the eclipse for that location.

Screenshots

Polar Scope Align Pro4 screens
EclipseGo4 screens

Verdict

The call

The clearest difference is price: EclipseGo at Free against Polar Scope Align Pro's $3.99. EclipseGo also leads on update cadence (every 3 weeks vs every 2 months). Polar Scope Align Pro's advantage is ratings volume (305 vs 2) and chart position (#95 vs unranked). On rating, ads, in-app purchases and monetization model 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

EclipseGo is free to download; Polar Scope Align Pro costs $3.99 up front. Polar Scope Align Pro sells 3 one-off in-app purchases and EclipseGo sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for Polar Scope Align Pro against 5.0 for EclipseGo. That said, the two scores are not equally well evidenced: Polar Scope Align Pro has 305 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Polar Scope Align Pro ships an update every 2 months, EclipseGo every 3 weeks. The most recent releases landed on September 30, 2026 and September 19, 2026 respectively.

Scorecard6 real differences · 5 level
Polar Scope Align Pro versus EclipseGo: the parameters behind the verdict, then further details
ParameterPolar Scope Align ProEclipseGo
Price$3.99Free — better
Rating4.9 (305 ratings)5.0 (2 ratings) — better
Positive reviews97.0% of reviews—
Number of ratings305 — better2
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank#95 — better—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better16.4
Further details — not scored
Size32 MB44 MB
Age rating4+4+
DeveloperDimitrios KechagiasGarafa, LLC

Customer experience

Polar Scope Align Pro

All ratings305 ratings
Positive99.0%
Neutral0.0%
Negative1.0%
Written reviews269 reviews
Positive97.0%
Neutral0.7%
Negative2.2%

EclipseGo

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Polar Scope Align Pro

Reported bugs

2 issues
  • Weather Updates Not Working
  • Compass Deflected by Mount

Requested features

2 requests
  • Add Observation Recording Feature
  • Add Push To Option for DSO Objects

EclipseGo

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

Polar Scope Align Pro

One-time3
  • Tip 1x$0.99
  • Tip 4x$3.99
  • Tip 10x$9.99
2 purchases

EclipseGo

One-time2
  • 2026 Eclipse Cloud Cover$3.99
  • Pro Upgrade$3.99

Questions

Is Polar Scope Align Pro free?
Polar Scope Align Pro costs $3.99, and also offers in-app purchases.
Is EclipseGo free?
EclipseGo is free to download, with in-app purchases available.
Which has better reviews, Polar Scope Align Pro or EclipseGo?
EclipseGo is rated higher. Polar Scope Align Pro averages 4.9 out of 5 from 305 ratings, while EclipseGo averages 5.0 from 2 ratings.
Do Polar Scope Align Pro or EclipseGo have ads?
Neither Polar Scope Align Pro nor EclipseGo shows ads.
Which is updated more often, Polar Scope Align Pro or EclipseGo?
Polar Scope Align Pro ships an update every 2 months, and EclipseGo every 3 weeks. Most recently, Polar Scope Align Pro was updated on September 30, 2026 and EclipseGo on September 19, 2026.

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