Comparison

Astrarium Sky Map vs DeepSpace

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

Head to head
About

Astrarium Sky Map

Features
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Astrariūm is a beautiful astronomy guide for planning what to see in the night sky. Explore a live sky map, follow upcoming sky events, learn constellations, and save your favorite objects for later. Whether you are watching the Moon, tracking planets, learning bright constellations, or planning a quiet stargazing session, Astrariūm helps make the sky easier to understand. Features: Live Sky Map Navigate stars, constellations, planets, and deep-sky objects with an interactive sky view. Tonight’s Sky See useful observing ideas for the current night, including Moon details, highlights, and seasonal suggestions. Sky Calendar Follow upcoming astronomy events such as moon phases, meteor activity, planet highlights, and special sky moments. Featured Guides Learn about constellations and celestial objects through short, visual guides made for casual sky watchers. Saved Sky Keep favorite objects ready so you can return to them during your next observing session. Astrariūm is designed for beginners, astronomy lovers, and anyone who wants a calmer, more visual way to explore the night sky. Privacy Policy: https://nhantran2112.github.io/astrarium-sky-map/privacy-policy.html Terms of Use: https://nhantran2112.github.io/astrarium-sky-map/terms-of-use.html

About

DeepSpace

Explore the night sky with a real-time star map. Identify stars, planets, constellations, and deep-sky objects by simply pointing your device. Features include a sky search, time machine, and observation journal.

Highlights
  • Gyroscope sky map
  • 16 constellations with mythology
  • 110 Messier objects
  • Tap to lock on celestial objects
  • Sky search and jump
  • Tonight's Sky view
  • Time Machine for planning
  • Observation journal
Features
Read full description

DeepSpace — Star & Planet Viewer Point your phone at the sky and see the stars move in real time. DeepSpace turns your device into a personal star atlas — no account, no subscription, no internet required. What's in the sky tonight? Hold up your phone and explore 95 named stars rendered in color by spectral type, all 8 planets, the Sun, and the Moon — their positions calculated from simplified orbital models and updated live. Accurate enough for casual stargazing and learning the sky; not a precision instrument. Features • Gyroscope sky map — point anywhere and the stars follow, at up to 120fps on supported devices • 16 constellations — tap any to see its mythology and star pattern • 110 Messier objects — galaxies, nebulae, and clusters plotted and tappable • Tap to lock on — tap any star or planet for its magnitude, coordinates, spectral type, and more • Sky search — find any object by name and jump to it instantly • Tonight's Sky — one tap shows what's visible right now: planets above the horizon, best deep-sky objects, and current moon phase • Time Machine — scrub forward or backward in time to plan or revisit a night • Observation journal — log your sightings with date, location, and notes • Celestial event alerts — get notified about oppositions, conjunctions, and lunar events for objects on your watch list • Milky Way overlay — the galactic band drawn across the sky • Red Night Mode — full red filter to protect your dark-adapted vision at the eyepiece • Share the sky — share a snapshot card of tonight's sky with friends • Portrait and landscape — works in any orientation on iPhone and iPad Honest about accuracy Star and planet positions use simplified orbital models this is great for finding constellations, identifying planets, and learning the night sky. For precise observation planning, pair it with a professional ephemeris.

Screenshots

Astrarium Sky Map4 screens
DeepSpace4 screens

Verdict

The call

The clearest difference is price: Astrarium Sky Map at Free against DeepSpace's $0.99. Astrarium Sky Map also leads on iOS requirement (17.0 vs 26.0). DeepSpace's advantage is in-app purchases (none vs 3) and update cadence (every 5 days vs every 3 weeks). On ads 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

CostPrice · In-app purchases · Ads · Monetization

Astrarium Sky Map is free to download; DeepSpace costs $0.99 up front. Astrarium Sky Map sells 3 in-app purchases, starting at $3.99 per 7 days. DeepSpace asks for nothing beyond the download.

UpkeepUpdate frequency

Astrarium Sky Map ships an update every 3 weeks, DeepSpace every 5 days. The most recent releases landed on October 16, 2026 and October 11, 2026 respectively.

Scorecard4 real differences · 5 level
Astrarium Sky Map versus DeepSpace: the parameters behind the verdict, then further details
ParameterAstrarium Sky MapDeepSpace
PriceFree — better$0.99
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 3 weeksEvery 5 days — better
AdsNoNo
In-app purchasesYesNo — better
Monetization—Paid
DevicesiPhone, iPadiPhone, iPad, Apple Watch — better
Requires iOS17.0 — better26.0
Further details — not scored
Size195 MB4 MB
Age rating4+4+
DeveloperNhan TranAlexandr Garlock Development House LLC

In-app purchases

3 purchases

Astrarium Sky Map

Subscriptions2
  • Weekly$3.997 Days
  • Yearly$14.991 Year
One-time1
  • Onetime$34.99
None

DeepSpace

No in-app purchases

Questions

Is Astrarium Sky Map free?
Astrarium Sky Map is free to download, with in-app purchases available.
Is DeepSpace free?
DeepSpace costs $0.99, with no in-app purchases.
Do Astrarium Sky Map or DeepSpace have ads?
Neither Astrarium Sky Map nor DeepSpace shows ads.
Which is updated more often, Astrarium Sky Map or DeepSpace?
Astrarium Sky Map ships an update every 3 weeks, and DeepSpace every 5 days. Most recently, Astrarium Sky Map was updated on October 16, 2026 and DeepSpace on October 11, 2026.

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