Comparison

Star Guide vs Astrarium Sky Map

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

Head to head
About

Star Guide

Explore the night sky in real-time with this interactive planetarium. Identify stars and planets, visualize celestial objects in 3D, and plan your stargazing sessions with time travel and location previews.

Highlights
  • Real-time planetarium view
  • Augmented Reality mode
  • 3D stars and planets
  • Best viewing time notifications
  • Sky motion preview
  • Past and future sky time travel
  • Location-based sky preview
Features
Read full description

Turn your phone into a real‑time planetarium. Star Guide helps you explore the night sky, identify stars and planets, and plan the best moments to look up—whether you’re stargazing tonight or previewing the sky months from now. Point your device upward to see what’s above you, switch on Augmented Reality (AR) for an immersive sky overlay, and explore celestial objects in 3D. Want to plan ahead? Travel through time to see how the sky changes in the past or future, and preview the view from different locations around the world. Key features • Live star finder & planetarium view Explore the night sky based on your position and direction. • Augmented Reality mode Overlay stars and planets on your camera view for easy identification. • 3D stars & planets Visualize objects in a more immersive way and explore in 3D. • Best viewing time notifications Get alerts for great stargazing moments and upcoming viewing opportunities. • 24‑hour sky motion preview See how a star moves and circles across the sky over a full day. • Past & future sky “time travel” Rewind to previous nights or fast‑forward to plan future observations. • Different locations Change your location to preview the sky from other places—perfect for trips. Great for • Casual stargazing from your backyard • Learning the night sky with an interactive planetarium • Planning the best time to spot planets • Exploring how the sky looks from other cities and countries Permissions (why they may be requested) • Location: improves sky accuracy for your current position • Camera: required for AR mode • Notifications: optional alerts for best viewing times Download Star Guide and start exploring the sky—right from your pocket.

About

Astrarium Sky Map

Features
Read full description

Astrarium 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

Screenshots

Star Guide4 screens
Astrarium Sky Map4 screens

Verdict

The call

The clearest difference is iOS requirement: Star Guide at 15.5 against Astrarium Sky Map's 17.0. On price, update cadence, 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. Star Guide sells 4 in-app purchases, starting at $1.99 per 7 days and Astrarium Sky Map sells 5 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Star Guide ships an update every 2 weeks, Astrarium Sky Map every 3 weeks. The most recent releases landed on November 7, 2026 and November 1, 2026 respectively.

Scorecard1 real difference · 9 level
Star Guide versus Astrarium Sky Map: the parameters behind the verdict, then further details
ParameterStar GuideAstrarium Sky Map
PriceFreeFree
Rating4.6 (4.4K ratings) — better—
Positive reviews27.0% of reviews—
Number of ratings4.4K — better—
Update frequencyEvery 2 weeks — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.5 — better17.0
Further details — not scored
Size220 MB197 MB
Age rating4++4
DeveloperStar registerNhan Tran

In-app purchases

4 purchases

Star Guide

Subscriptions3
  • Weekly$1.997 Days
  • Star-Registration Premium1 Month trial$4.991 Month
  • Annually$29.991 Year
One-time1
  • One time$24.99
5 purchases

Astrarium Sky Map

Subscriptions3
  • Weekly$1.997 Days
  • Weekly$3.997 Days
  • Yearly$14.991 Year
One-time2
  • Remove ads$5.99
  • Onetime$34.99

Questions

Is Star Guide free?
Star Guide is free to download, with in-app purchases available.
Is Astrarium Sky Map free?
Astrarium Sky Map is free to download, with in-app purchases available.
Do Star Guide or Astrarium Sky Map have ads?
Neither Star Guide nor Astrarium Sky Map shows ads.
Which is updated more often, Star Guide or Astrarium Sky Map?
Star Guide ships an update every 2 weeks, and Astrarium Sky Map every 3 weeks. Most recently, Star Guide was updated on November 7, 2026 and Astrarium Sky Map on November 1, 2026.

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