Comparison

Constellation Guide vs Sky Map

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

Head to head
About

Constellation Guide

Explore the night sky with an AI-powered guide. Identify stars, constellations, and planets in real-time with AR overlays. Learn astronomy through stories and deep space exploration, all available offline.

Highlights
  • AI Sky Guide for astronomy questions
  • Deep Space Zoom into nebulae and galaxies
  • Astronomy Stories and Constellation Art
  • Time Travel to past and future sky views
  • AR Camera Mode for real-time identification
  • Offline sky mapping
Features
Read full description

Explore the night sky with AI-powered guidance. Constellation Guide features 88 constellations, 8,835 stars, and intelligent chat to answer your astronomy questions — all offline. Perfect for: • Identifying stars and constellations in real-time • Learning astronomy with AI assistance • Planning stargazing sessions • Offline sky mapping anywhere • Space exploration and education Perfect for: • Identifying stars and constellations in real-time • Learning astronomy with AI assistance • Planning stargazing sessions • Offline sky mapping anywhere • Space exploration and education WHAT MAKES CONSTELLATION GUIDE DIFFERENT • AI Sky Guide Ask anything about astronomy and get instant, accurate answers. Your AI astronomer knows the cosmos inside out and can explain everything from black holes to meteor showers in plain language. • Deep Space Zoom Dive into nebulae, galaxies, and star clusters with unprecedented detail. Explore the Orion Nebula, Andromeda Galaxy, and more deep space wonders. • Astronomy Stories Discover the myths, science, and history behind every constellation. From ancient Greek legends to modern astrophysics, there's always something new to learn. • Beautiful Constellation Art See constellations come alive with hand-crafted artwork that brings ancient star patterns into the modern age. • Time Travel Rewind to see the sky on any historical date, or fast-forward to plan tomorrow's stargazing session. Watch planets dance across the heavens at any speed. • AR Camera Mode Overlay constellations directly onto your real-time camera view. Perfect for identifying stars when you're actually outside under the night sky. • Night Mode Preserve your night vision with a red-tinted display that won't ruin your eyes' adaptation to darkness. • Works Offline Take the entire cosmos with you anywhere. No internet required once downloaded. COMPLETE FEATURES • Real-time sky map that follows your device's movement • Thousands of stars with accurate positions and data • 88 constellations from cultures around the world • Planets, moons, and the International Space Station • Deep zoom into nebulae and galaxies • AI astronomer for instant answers to any space question • Hundreds of curated astronomy stories and facts • Time travel to any date, past or future • AR camera overlay for stargazing outdoors • Night mode to protect your vision • Search to find any celestial object instantly • Works completely offline • No ads, ever PERFECT FOR • Backyard stargazers who want to know what they're looking at • Parents teaching kids about space and science • Campers and hikers exploring dark sky locations • Amateur astronomers planning observations • Anyone curious about the universe above SUBSCRIPTION & PRICING Constellation Guide is free to download with a 3-day trial. After the trial: • Monthly: $6.99/month • Annual: $39.99/year (save 52%) Subscription automatically renews unless cancelled at least 24 hours before the end of the current period. Manage subscriptions in your App Store account settings. ABOUT THE DATA Our comprehensive star database features thousands of stars with positions accurate to modern astronomical standards. Constellation artwork and stories are carefully researched and beautifully presented. Deep space images come from professional astronomy sources. PRIVACY & SUPPORT We respect your privacy. Location is used only to show your local sky and is never shared. Privacy Policy: https://probabilityapps.com/privacy Terms of Service: https://probabilityapps.com/terms Support: support@probabilityapps.com Point your device at the stars. Discover the universe.

About

Sky Map

Identify stars, planets, constellations, and satellites by pointing your phone at the night sky. Features an AR finder, event calendar, and AI astronomer to guide your stargazing experience.

Highlights
  • AR sky view with real-time object identification
  • Constellation illustrations and myths
  • Eclipse and sky event calendar with alerts
  • Guided object finder with haptic feedback
  • Aurora forecast and ISS/Hubble pass tracking
  • AI astronomer for celestial object queries
  • Dark Sky Map with stargazing spot ratings
Features
Read full description

See exactly what you're looking at — the moment you look up. Point your phone at the night sky and Sky Map instantly identifies the stars, planets, constellations, galaxies and satellites above you. No coordinates to decode, no guesswork — just follow the arrow and look up. NEW: BUILT FOR IPHONE DUO • Stand it up — the top half is a window to the sky, the bottom half your observatory console. Turn the phone to look around; tilt the lid back to look higher. • Open it like a book — a star atlas: the map on one page, the story of what you're looking at on the other. • Lay it flat — the whole sky on one star wheel. • Tonight, Explore, Passes and Tools use both halves of the screen. HIGHLIGHTS • 88 Illustrated Constellations — Every constellation drawn as a glowing figure over its real stars. Tap one for its myth, its brightest stars and how to find it. Switch the drawings off anytime. • Eclipse & Sky Event Calendar — Solar and lunar eclipses, meteor showers, planet conjunctions and oppositions, full moons, equinoxes and solstices, all calculated for your exact location with the best time to look. Get an alert before each one. • Milky Way & Deep-Sky Photos — A real Milky Way across your sky, plus telescope photos of 30 galaxies, nebulae and star clusters — Andromeda, the Orion Nebula, the Pleiades — shown exactly where they are. • Home & Lock Screen Widgets — Tonight's Moon phase and the next sky event, at a glance. • More Accurate AR — The sky stays lined up when you tilt your phone, and you can align it to the Sun or Moon in seconds. EVERYTHING YOU NEED UNDER THE STARS • AR Sky View — Point your camera at the sky and see labels on the real thing, matched to your camera's actual field of view. • Guided Object Finder — An on-screen arrow, with a haptic tap the moment you're on target, walks you to any star, planet or satellite. • Tonight's Observing Score — Cloud cover, humidity, visibility and Moon brightness in one number that tells you whether tonight is worth going out. • ISS & Hubble Passes — Rise, peak and set times from live orbital data, with a visibility rating so you know which passes you can actually see. • Aurora Forecast — Northern lights chances for your location from NOAA space-weather data, the Kp level your latitude needs, and a three-day outlook with alerts. • Nova, Your AI Astronomer — Ask "What's that bright star?" or "Where's Saturn tonight?" and get an answer based on your exact sky. • Dark Sky Map — 88 of the world's best stargazing spots, sorted by distance, with darkness and Bortle ratings. • Time Travel — See the sky on any date from 1900 to 2100. • Red Night Mode — A true red interface that protects your night vision. • Observation Journal & Planner — Log sessions with photos, equipment and notes, and get a reminder before your target rises. • Astrophotography Tips — Lens, exposure and ISO starting points for whatever you're pointing at. • Beginner & Expert Modes — Plain-language directions for newcomers, precise coordinates and magnitudes for seasoned stargazers. • Works Offline — Stars, constellation figures, photos and planet positions are all on your device. HOW IT WORKS 1. Open Sky Map and hold your phone up to the sky. 2. Search for anything — a planet, a star, the ISS — or see what's visible right now. 3. Follow the arrow, feel the tap when you're on target, and look up. SKY MAP PLUS Sky Map Plus unlocks every feature. Choose a monthly or annual subscription; the annual plan starts with a 3-day free trial. Payment is charged to your Apple ID when you confirm your purchase. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. You can manage or cancel your subscription in your App Store account settings. Privacy Policy: https://skymapapp.netlify.app/#privacy Terms of Use: https://skymapapp.netlify.app/#terms

Screenshots

Constellation Guide4 screens
Sky Map4 screens

Verdict

The call

The clearest difference is rating: Constellation Guide at 5.0 against Sky Map's 4.5. On price, review sentiment, ratings volume and update cadence 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. Constellation Guide sells 2 in-app purchases, starting at $9.99 per month and Sky Map sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Constellation Guide holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 3 and 6 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

Scorecard1 real difference · 9 level
Constellation Guide versus Sky Map: the parameters behind the verdict, then further details
ParameterConstellation GuideSky Map
PriceFreeFree
Rating5.0 (3 ratings) — better4.5 (6 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings36 — better
Update frequencyFortnightlyFortnightly
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size104 MB41 MB
Age rating4+4+
DeveloperPROBABILITY LLCHorus Studios

Customer experience

Constellation Guide

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Sky Map

All ratings6 ratings
Positive83.3%
Neutral16.7%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Constellation Guide

Subscriptions2
  • Pro Monthly3 Days trial$9.991 Month
  • Pro Annual3 Days trial$39.991 Year
2 purchases

Sky Map

Subscriptions2
  • Sky Map Plus Monthly$4.991 Month
  • Sky Map Plus Annual3 Days trial$29.991 Year

Questions

Is Constellation Guide free?
Constellation Guide is free to download, with in-app purchases available.
Is Sky Map free?
Sky Map is free to download, with in-app purchases available.
Which has better reviews, Constellation Guide or Sky Map?
Constellation Guide is rated higher. Constellation Guide averages 5.0 out of 5 from 3 ratings, while Sky Map averages 4.5 from 6 ratings.
Do Constellation Guide or Sky Map have ads?
Neither Constellation Guide nor Sky Map shows ads.
Which is updated more often, Constellation Guide or Sky Map?
Constellation Guide ships an update fortnightly, and Sky Map fortnightly. Most recently, Constellation Guide was updated on October 31, 2026 and Sky Map on November 5, 2026.

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