Polar Scope Align Pro vs AstroVitals
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
AstroVitals
Monitor your telescope's vital signs remotely from your iPhone, iPad, or Apple Watch. View guiding, focus, image quality, and sequence progress on a glanceable dashboard. Receive smart alerts and optionally control your imaging session.
- Live guiding graphs and stability scores
- Autofocus V-curve visualization
- Full sequence tree with progress
- 3D mount position and target altitude
- Apple Watch app and complications
- Home and lock screen widgets
- Smart alerts for image quality and guiding
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Your telescope is imaging all night. AstroVitals puts its vital signs on your iPhone, iPad and Apple Watch — so you can check on the session from the couch, the tent, or your wrist at 3 AM. AstroVitals connects to N.I.N.A. (Nighttime Imaging 'N' Astronomy) over your local network through the Advanced API plugin, and turns the numbers into a dark, glanceable night-vision dashboard. GUIDING AT A GLANCE • Flowing RA/Dec guide graph, just like your guiding software • Live total RMS plus session best, worst and stability score • Peak-error and pixel-scale readouts, adjustable time window FOCUS & IMAGE QUALITY • Watch autofocus V-curves build point by point, live • Best-focus position and HFR marked when the run completes • HFR and star-count trends across every sub of the session YOUR WHOLE SEQUENCE • The full Advanced Sequencer tree — instructions, triggers, loop conditions • The running step highlighted with live progress (87/250 exposures…) • Values shown inline: exposure length, filter, wait-until times and more THE STATS DASHBOARD • A live 3D model of your mount showing exactly where it points, with meridian-flip warning colors and flat-panel cover state • Target altitude path with transit time and astronomical darkness • Camera cooling, ambient temperature, power draw and input voltage • Rearrangeable tiles — drag them into your preferred layout ON YOUR WRIST • The full dashboard as a native Apple Watch app • Watch-face complications: meridian-flip countdown and subs done • iPhone home-screen and lock-screen widgets with a live flip timer SIMPLE SETUP • Auto-discovers your NINA machine on the local network • Demo mode simulates a full session — try every screen without a telescope SMART ALERTS & CONFIRMED CONTROL • Optional alerts for worsening or recovering image quality, lost guiding and meridian-flip progress while AstroVitals is active • Start, pause and stop the running sequence when Allow Control is enabled • A configurable panic plan can stop activity, park or home the mount, close a detected flat-panel cover and disable selected power outputs • Siri opens the review-and-slide confirmation screen; it never sends a command by itself Requires N.I.N.A. with the free Advanced API plugin (v2) on the same network. AstroVitals starts in Read-only mode. Control requires explicit opt-in and confirmation, and remains on the user's local network. No accounts, no analytics, no data leaves your network.
Screenshots
Verdict
The clearest difference is review sentiment: Polar Scope Align Pro at 97% against AstroVitals's 50%. Polar Scope Align Pro also leads on rating (4.9 vs 3.7) and ratings volume (310 vs 3). AstroVitals's advantage is price (Free vs $4.99) and update cadence (every 3 weeks vs every 2 months). On ads, in-app purchases and device support 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
AstroVitals is free to download; Polar Scope Align Pro costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Polar Scope Align Pro holds the better App Store score, 4.9 against 3.7. That said, the two scores are not equally well evidenced: Polar Scope Align Pro has 310 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 97% of Polar Scope Align Pro's written reviews are positive against 50% of AstroVitals's.
Polar Scope Align Pro ships an update every 2 months, AstroVitals every 3 weeks. The most recent releases landed on November 11, 2026 and October 31, 2026 respectively.
| Parameter | Polar Scope Align Pro | AstroVitals |
|---|---|---|
| Price | $4.99 | Free — better |
| Rating | 4.9 (310 ratings) — better | 3.7 (3 ratings) |
| Positive reviews | 96.7% of reviews — better | 50.0% of reviews |
| Number of ratings | 310 — better | 3 |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free with in-app purchases | Free — better |
| Best chart rank | #174 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 33 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Dimitrios Kechagias | MAXIMILIAN BOTEV |
Customer experience
Polar Scope Align Pro
AstroVitals
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
AstroVitals
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Polar Scope Align Pro
No in-app purchases
AstroVitals
No in-app purchases
Questions
Is Polar Scope Align Pro free?
Is AstroVitals free?
Which has better reviews, Polar Scope Align Pro or AstroVitals?
Do Polar Scope Align Pro or AstroVitals have ads?
Which is updated more often, Polar Scope Align Pro or AstroVitals?
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