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, constellations, planets, and satellites in real time by pointing your device at the sky. Explore celestial objects, track satellites, and discover what's visible tonight with AR overlays and time travel features.

Highlights
  • Real-time sky tracking with AR
  • Instant object identification
  • Augmented reality overlays
  • Time travel sky view
  • Satellite tracking (ISS)
  • Tonight's sky highlights
  • Night mode (red-light filter)
Features
Read full description

Explore the universe from your pocket with Sky Map – Star Tracker. Turn your iPhone into a powerful stargazing tool. Simply point your device at the sky to instantly identify stars, constellations, planets, and satellites in real time. Whether you're a beginner or an astronomy enthusiast, discovering the night sky has never been easier. KEY FEATURES Real-Time Sky Tracking Navigate the night sky with precision using AR technology. Watch stars and planets align exactly where they are above you. Instant Object Identification Tap any star or object to learn its name, distance, brightness, and more detailed information. Augmented Reality Mode Overlay constellations, star paths, and labels directly onto the live sky using your camera. Time Travel Sky Move forward or backward in time to see how the sky changes. Track planet movement and upcoming celestial events. Satellite Tracking Follow satellites like the ISS in real time and never miss a pass again. Tonight’s Sky Highlights Discover the best stars, planets, and constellations visible in your location tonight. Night Mode Protect your eyes with a red-light filter designed for comfortable night viewing. PREMIUM FEATURES Access thousands of deep-sky objects (galaxies, nebulae) Advanced zoom for telescope-like experience Smart observation lists Full event calendar (meteor showers, eclipses) Ad-free experience PERFECT FOR Stargazing beginners Astronomy lovers Students & educators Outdoor explorers WHY SKY MAP – STAR TRACKER? Accurate and smooth tracking Beautiful, modern interface Works offline Easy to use for all levels We currently offer the following auto-renewing subscription option: -$7.99 per month -$34.99 per month Payment will be charged to iTunes Account at confirmation of purchase. Your subscription will automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Your account will be charged for renewal within 24-hours prior to the end of the current period. Subscriptions may be managed and auto-renewal may be turned off by going to the Account Settings after purchase. No cancellation of the current subscription is allowed during active subscription period. • Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable Terms of Use: https://tos.nguyenanhapps.com Privacy Policy: https://privacy.nguyenanhapps.com

Screenshots

Constellation Guide4 screens
Sky Map3 screens

Verdict

The call

The clearest difference is review sentiment: Constellation Guide at 100% against Sky Map's 0%. Constellation Guide also leads on rating (5.0 vs 1.0) and update cadence (fortnightly vs every 5 weeks). On price, ratings volume, ads and in-app purchases 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 3 in-app purchases, starting at $7.99 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 1.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews point the same way: 100% of Constellation Guide's written reviews are positive against 0% of Sky Map's.

UpkeepUpdate frequency

Constellation Guide ships an update fortnightly, Sky Map every 5 weeks. The most recent releases landed on October 10, 2026 and October 20, 2026 respectively.

Scorecard3 real differences · 7 level
Constellation Guide versus Sky Map: the parameters behind the verdict, then further details
ParameterConstellation GuideSky Map
PriceFreeFree
Rating5.0 (2 ratings) — better1.0 (1 ratings)
Positive reviews100.0% of reviews — better0.0% of reviews
Number of ratings2 — better1
Update frequencyFortnightly — betterEvery 5 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size104 MB13 MB
Age rating4+4+
DeveloperPROBABILITY LLCNguyen Anh

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 ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

2 purchases

Constellation Guide

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

Sky Map

Subscriptions2
  • Sky Map Premium Monthly$7.991 Month
  • Sky Map Premium Yearly$34.991 Year
One-time1
  • Sky Map Premium Lifetime$49.99

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 2 ratings, while Sky Map averages 1.0 from 1 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 every 5 weeks. Most recently, Constellation Guide was updated on October 10, 2026 and Sky Map on October 20, 2026.

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