Astrarium Sky Map vs DeepSpace
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Astrarium Sky Map
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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
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.
- 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
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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
Verdict
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
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.
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.
| Parameter | Astrarium Sky Map | DeepSpace |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 weeks | Every 5 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | — | Paid |
| Devices | iPhone, iPad | iPhone, iPad, Apple Watch — better |
| Requires iOS | 17.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 195 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Nhan Tran | Alexandr Garlock Development House LLC |
In-app purchases
Astrarium Sky Map
- Weekly$3.997 Days
- Yearly$14.991 Year
- Onetime$34.99
DeepSpace
No in-app purchases
Questions
Is Astrarium Sky Map free?
Is DeepSpace free?
Do Astrarium Sky Map or DeepSpace have ads?
Which is updated more often, Astrarium Sky Map or DeepSpace?
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