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Best Free Astronomy Apps

206+ iOS apps curated and reviewed

4.6 avg rating
19 free apps
Updated July 2026

If you already know Sky Guide, this is the deeper bench. 206+ free astronomy apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of July 2026.

Compare top Free Astronomy Apps (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Sky GuideSky GuideFree4.8★ (367K)NoYesJul 2026
2Night SkyNight SkyFree4.7★ (482K)NoYesJul 2026
3SkyView® LiteSkyView® LiteFree4.5★ (18K)YesYesJul 2026
4Stellarium Mobile - Star MapStellarium Mobile - Star MapFree4.8★ (36K)NoYesJul 2026
5Carte Du CielCarte Du CielFree4.6★ (25K)NoYesJul 2026
6Star Walk 2 Plus: Live Sky MapStar Walk 2 Plus: Live Sky MapFree4.6★ (93K)YesYesJul 2026
7Sky Tonight - Stargazing GuideSky Tonight - Stargazing GuideFree4.8★ (74K)YesYesJul 2026
8Pocket UniversePocket UniverseFree was $2.994.5★ (253)NoYesJul 2026

Top Picks for Free Astronomy Apps

Sky Guide#1

Sky Guide by Fifth Star Labs LLC

Star gaze constellation finder
Editor's Choice
🔍 Reference
4.8😊(367K ratings)
FreeIn-App Purchases
#8in Reference
Sky Guide screenshot 1
Sky Guide screenshot 2
Sky Guide screenshot 3
Sky Guide screenshot 4
Sky Guide screenshot 5
Sky Guide screenshot 6

Identify stars, constellations, planets, and satellites in real-time by holding your device overhead. Explore celestial bodies with AR overlays, track satellites like the ISS, and travel through time to view past and future astronomical events. Perfect for both novice and experienced stargazers.

What We Love

  • 🌟 Stunning visuals and graphics
  • 📚 Wealth of information on celestial objects
  • 🧭 Accurate and responsive compass/AR features
  • 🌌 Immersive stargazing experience

Room to Improve

  • 🧭 Occasional compass/location calibration issues
  • 💰 Subscription model limits access to some features
  • 🌍 Lack of support for certain regions/locations
Night Sky#2

Night Sky by iCandi Apps Ltd.

Guide to Stars,Comets,Meteors
Strong Contender
🔍 Reference
4.7😊(482K ratings)
FreeIn-App Purchases
#15in Reference
Night Sky screenshot 1
Night Sky screenshot 2
Night Sky screenshot 3
Night Sky screenshot 4
Night Sky screenshot 5
Night Sky screenshot 6

Explore the cosmos with an AI-powered planetarium. Identify stars, planets, and satellites by pointing your device at the sky. Discover celestial objects in augmented reality and share your stargazing experiences with others.

What We Love

  • 🌟 Excellent app for stargazing and learning about the night sky
  • 🔭 Detailed information on celestial objects, satellites, and space events
  • 🌍 Accurate mapping of the sky to real-world locations
  • 🎨 Beautiful visuals and animations

Room to Improve

  • 💰 Frequent prompts to upgrade to premium subscription
  • 🔌 Concerns about high battery consumption
  • 🤔 Calibration and alignment issues with the AR features
SkyView® Lite#3

SkyView® Lite by Terminal Eleven LLC

Explore the Universe
Worth Considering
📚 Education
4.5😊(18K ratings)
FreeAdsIn-App Purchases
#32in Education
SkyView® Lite screenshot 1
SkyView® Lite screenshot 2
SkyView® Lite screenshot 3
SkyView® Lite screenshot 4

Identify stars, constellations, satellites, and more by simply pointing your device at the sky. This augmented reality app makes stargazing accessible to everyone, day or night. Explore celestial paths and even travel through time to view the sky on different dates.

What We Love

  • 🌟 Accurate star and planet tracking
  • 👍 Easy to use and navigate
  • 🔭 Helpful for learning about the night sky
  • 💫 Engaging and educational for all ages

Room to Improve

  • 🐛 Compass/location issues causing inaccurate positioning
  • 🔍 Limited free features, many paid upgrades
  • 🤔 Confusing for some users to understand how it works

More Free Astronomy Apps apps to explore

4
Stellarium Mobile - Star Map
Stellarium Mobile - Star Map
Stellarium Mobile - Star Map
Watch night sky, find stars
Free

Explore the night sky with a real-time planetarium. Identify stars, planets, constellations, and satellites by simply pointing your phone. Offers detailed astronomical data and cultural constellation interpretations.

Real-time sky simulationIdentify stars, planets, satellitesConstellation shapes and illustrations
📚 Education
(36K)
free with in-app purchases
5
Carte Du Ciel
Carte Du Ciel
Carte Du Ciel
by ESCAPE VELOCITY LIMITED
Free

Explore the cosmos with this augmented reality astronomy app. Point your device at the sky to identify stars, planets, and constellations in real-time. Discover celestial bodies and their positions, even traveling through time to view the universe's past and future.

Augmented reality sky identification3D simulation of the visible universeReal-time celestial object tracking
📚 Education
(25K)
free with in-app purchases
6
Star Walk 2 Plus: Live Sky Map
Star Walk 2 Plus: Live Sky Map
Star Walk 2 Plus: Live Sky Map
Your Free Path to the Stars
Free

Explore the cosmos with a real-time sky map. Point your device to identify stars, planets, and constellations. Discover celestial events and learn about the universe with detailed information and 3D models.

Real-time sky map3D constellation modelsTime machine feature
📚 Education
(93K)
free with in-app purchases
7
Sky Tonight - Stargazing Guide
Sky Tonight - Stargazing Guide
Sky Tonight - Stargazing Guide
Constellation Star Finder App
Free

Explore the night sky with this astronomy app. Identify celestial objects, discover upcoming astronomical events, and track their positions. Customize your view, set reminders, and access detailed information for a personalized stargazing experience.

Real-time interactive sky mapAugmented reality modeTime Machine for past/future positions
🔍 Reference
(74K)
free with in-app purchases
8
Pocket Universe
Pocket Universe
Pocket Universe
Star Map & Night Sky Guide
Free
$2.99 | 100% OFF

Explore the night sky with this intuitive guide. Identify planets, constellations, and satellites by simply pointing your device. Discover celestial events, track celestial bodies, and learn about thousands of astronomical objects.

Live sky view with object identificationTime travel for celestial event predictionExplore mode for upcoming events and solar activity
📚 Education
(253)
paid
9
Planets
Planets
Planets
by Q Continuum
Free

Explore the solar system with a 3D guide. Discover planets, moons, and celestial events with interactive sky views and visibility information. Perfect for budding astronomers.

3D solar system guide2D sky view3D planetarium sky view
🔧 Utilities
(899)
free
10
Star Walk：Find Stars & Planets
Star Walk：Find Stars & Planets
Star Walk：Find Stars & Planets
Night Sky Guide - Star Map AR
Free

Explore the night sky with an interactive guide that identifies stars, planets, and constellations in real-time using augmented reality. Discover over 200,000 celestial bodies with detailed information and track astronomical events.

Real-time night sky mapAugmented reality viewExplore 200,000+ celestial bodies
📚 Education
(25K)
free with in-app purchases
11
Star Gazer: Sky Map& Astronomy
Star Gazer: Sky Map& Astronomy
Star Gazer: Sky Map& Astronomy
Stars, Moon & Constellation.s
Free

Explore the cosmos by pointing your device at the sky. Discover stars, planets, and constellations with interactive 3D views and augmented reality. Learn fascinating facts about space and celestial bodies.

Interactive 3D celestial object viewsAugmented reality sky explorationIdentify stars, planets, and constellations
📚 Education
(6.8K)
subscription
12
NASA
NASA
NASA
by NASA
Free

Explore the universe with access to live and on-demand NASA+ videos, a vast collection of stunning images, and the latest mission news. Discover interactive augmented reality experiences and track the International Space Station's path.

NASA+ video streaming21,000+ NASA imagesLatest NASA news
📚 Education
(64K)
free
13
Solar Walk Lite - Planetarium
Solar Walk Lite - Planetarium
Solar Walk Lite - Planetarium
Planets System & Astronomy 3D
Free

Explore our Solar System in an interactive 3D model. Discover celestial bodies with detailed information, real photos, and stunning visuals. This free app offers a pocket planetarium experience without requiring an internet connection.

Interactive 3D Solar System modelReal-time celestial body positionsDetailed information and photos
🔍 Reference
(31K)
free with in-app purchases
14
Текущая фаза луны и календарь
Текущая фаза луны и календарь
Текущая фаза луны и календарь
Full Moon Phase
Free

This app provides detailed information about moon phases, moon age, and celestial events. Get accurate moonrise and moonset times, notifications for upcoming events, and track the sun's position. It's designed for both casual users and dedicated skywatchers.

Current moon phase and ageMoonrise and moonset timesNext full moon finder
☀️ Weather
(37K)
free with in-app purchases
15
Classic Sky Map 2
Classic Sky Map 2
Classic Sky Map 2
Astronomy made easy.
Free

Explore the cosmos with an intuitive and beautiful sky map. Easily identify stars, planets, and constellations by simply pointing your device at the sky. Track celestial events and understand astronomical movements with time-lapse features.

Live sky trackingInteractive earth mapTime-lapse sky simulation
📚 Education
(8.9K)
free with in-app purchases
16
OSR Star Finder
OSR Star Finder
OSR Star Finder
Stars, Constellations & More
Free

Explore the night sky and locate your named star with this augmented reality app. Discover constellations, learn about celestial bodies, and easily find when and where to view your star from your location. Share your stargazing experiences with others.

Name and find your own starLocate and track starsExplore 88 constellations with artwork
📚 Education
(4.6K)
free
17
SkyView®
SkyView®
SkyView®
Explore the Universe
$2.99

Identify stars, constellations, planets, and satellites by simply pointing your device at the sky. This app uses augmented reality to guide you and provides information on celestial objects, upcoming events, and even allows you to travel through time to view the sky on different dates.

Identify stars, planets, and satellites with ARDiscover all 88 constellationsSchedule alerts for celestial events
📚 Education
(7.5K)
free
18
Star Gazer - Live Sky View Map
Star Gazer - Live Sky View Map
Star Gazer - Live Sky View Map
Planet & Constellation Finder
Free

Explore the night sky with a powerful stargazing companion. Identify stars, planets, and constellations with real-time tracking and stunning 3D visualizations. Stay informed about cosmic events and learn fascinating facts about the universe.

Live sky view mapStar and constellation identificationDetailed celestial object information
🔧 Utilities
(1.5K)
free with in-app purchases
19
APOD — Astronomy Picture
APOD — Astronomy Picture
APOD — Astronomy Picture
Astronomy Picture of the Day
Free

Access NASA's daily astronomy images and explanations from professional astronomers. Explore stunning visuals of the universe, save your favorites, and share them with others.

Daily NASA astronomy picturesBrief explanations by astronomersAccess to the entire collection
🎬 Entertainment
(1.2K)
free with in-app purchases
20
Star Tracker Lite-Live Sky Map
Star Tracker Lite-Live Sky Map
Star Tracker Lite-Live Sky Map
Night stars guide & tracker
Free

Explore the universe by pointing your device at the sky. Identify stars, constellations, and deep sky objects in real-time. Features offline data, a 3D compass in AR mode, and detailed graphics for an immersive stargazing experience.

Offline celestial dataIdentify stars, constellations, planetsAugmented reality compass
🔍 Reference
(2K)
free with in-app purchases

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FAQ about Free Astronomy Apps

What are the best free astronomy apps for iPhone?
Sky Guide tops our free astronomy apps ranking as of July 2026, with a 4.8-star average from 367K App Store ratings, and it's free to download.
Sky Guide has no ads and offers in-app purchases, according to its App Store listing as of July 2026.
We track 206+ free astronomy apps on the iOS App Store as of July 2026, ranked by rating, recency, and analysis of real user reviews.
Sky Guide helps you identify celestial objects in the night sky. By holding your device up, it automatically recognizes stars, constellations, planets, and satellites. It uses augmented reality to overlay these figures onto your view of the real sky, making it easy to visualize and learn about the heavens.
Key features include automatic identification of celestial bodies, an AR mode for visualizing the sky, satellite tracking with notifications (like for the ISS), time travel controls to view past and future astronomical events, and a personalized calendar for events like eclipses. It also functions offline without Wi-Fi, cellular service, or GPS.

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