Comparison

Stellarium Mobile vs SKUL

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

Head to head
About

Stellarium Mobile

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.

Highlights
  • Real-time sky simulation
  • Identify stars, planets, satellites
  • Constellation shapes and illustrations
  • Deep sky object catalog
  • Night mode for eye comfort
  • Telescope control (Plus)
Features
Currently charting
Read full description

Stellarium Mobile is a planetarium app that shows exactly what you see when you look up at the stars. Identify stars, constellations, planets, comets, satellites (such as the ISS), and other deep sky objects in real time in the sky above you in just a few seconds, just by pointing the phone at the sky! This astronomy application has an easy to use and minimalist user interface, that makes it one of the best astronomical applications for adults and children who want to explore the night sky. Stellarium Mobile features: • View an accurate night sky simulation of stars and planets for any date, time and location. • Dive in a collection of many stars, nebulas, galaxies, star clusters and other deep sky objects. • Zoom on realistic Milky Way and Deep Sky Objects images. • Discover how people living in other regions of the planet see the stars by selecting the shapes and illustrations of the constellations for many sky cultures. • Track artificial satellites, including the International Space Station. • Simulate landscape and atmosphere with realistic sunrise, sunset and atmosphere refraction. • Discover 3D rendering of the major solar system planets and their satellites. • Observe the sky in night mode (red) to preserve your eyes adaptation to darkness. Stellarium Mobile contains in-app purchases allowing to upgrade to Stellarium Plus. With this upgrade, the app will display objects as faint as magnitude 22 (versus magnitude 8 in the base version) and enable advanced observing features. Stellarium Plus features (unlocked with in-app purchase): • Reach the limit of knowledge by diving in a massive collection of stars, nebulas, galaxies, star clusters and other deep sky objects:   - All known stars: Gaia DR2 catalog of over 1.69 billion stars   - All known planets, natural satellites and comets, and many other minor solar system objects (10k asteroids)   - Most known deep sky objects: a combined catalog of over 2 million nebulas and galaxies • Zoom almost without limits on high resolution images of deep sky objects or planetary surfaces. • Observe in the field, even without internet connection, with a "reduced" set of data: 2 million stars, 2 million Deep Sky Objects, 10k asteroids. • Control your telescope through WIFI: drive any GOTO telescope compatible with NexStar, SynScan or LX200 protocols. • Prepare your observing sessions using the advanced observation tools, to predict a celestial object observability and transit times. Stellarium Mobile is made by the original creator of Stellarium, the well known open source planetarium and one of the best astronomy applications on Desktop PC. Your can unlock the full features using either a one time payment or a subscription. See In-App Purchase section for the subscription price available in your country. Payment will be charged to your iTunes account. Your subscription will automatically renew unless cancelled 24 hours prior to the end of the current period. Auto renewal may be turned off at any time by going to your account settings after purchases. Terms of service: https://stellarium-labs.com/stellarium-mobile-plus/stellarium-mobile-terms-of-use Privacy policy: https://www.stellarium-labs.com/privacy-policy-for-stellarium-mobile

About

SKUL

Access verified solutions and explanations for homework assignments from textbooks and workbooks for grades 4-8 and high school. Covers subjects like math, chemistry, and Polish, with practice exams also available. It's a free, ad-free resource to help students understand and verify their homework.

Highlights
  • Verified homework solutions
  • Teacher-prepared explanations
  • Covers grades 4-8 and high school
  • Subjects: Math, Chemistry, Polish, History, Biology, Physics, Geography, Nature, WOS
  • Practice exams for Matura and 8th grade
  • Ad-free and no account required
Features
Read full description

Skul.pl to darmowa aplikacja mobilna, w której znajdziesz sprawdzone przez nauczycieli rozwiązania zadań z podręczników, zeszytów ćwiczeń i zbiorów zadań do klas 4-8 szkoły podstawowej i 1-4 szkoły średniej (liceum, technikum). Do każdego zadania znajdziesz dokładne rozwiązanie oraz przygotowane przez nauczyciela wyjaśnienie dojścia do rozwiązania. W aplikacji znajdziesz takie przedmioty jak: matematyka, chemia, język polski, historia, biologia, fizyka, geografia, przyroda i WOS na poziomie podstawowym i rozszerzonym. Aplikacja Skul.pl to świetne miejsce, żeby upewnić się, że dobrze rozwiązałeś zadanie domowe. Nie umiesz go rozwiązać? Zapoznaj się z wyjaśnieniem, żeby zrozumieć problem. Dodatkowo w serwisie udostępniamy rozwiązane arkusze maturalne i egzaminu ósmoklasisty z matematyki. Kolejne przedmioty już w przygotowaniu! Korzystanie z aplikacji Skul.pl jest całkowicie darmowe. Co więcej, w serwisie i aplikacji nie znajdziesz żadnych reklam, nie wymagamy też założenia konta.

Screenshots

Stellarium Mobile4 screens
SKUL4 screens

Verdict

The call

The clearest difference is in-app purchases: SKUL at none against Stellarium Mobile's 2. SKUL also leads on iOS requirement (15.0 vs 17). Stellarium Mobile's advantage is ratings volume (39K vs 1) and chart position (#61 vs unranked). On price, rating, update cadence and ads 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. Stellarium Mobile sells 2 in-app purchases, starting at $1.99 per month. SKUL asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

SKUL holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Stellarium Mobile has 39K ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Stellarium Mobile ships an update every 5 weeks, SKUL every 2 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

Scorecard5 real differences · 6 level
Stellarium Mobile versus SKUL: the parameters behind the verdict, then further details
ParameterStellarium MobileSKUL
PriceFreeFree
Rating4.8 (39K ratings)5.0 (1 ratings) — better
Positive reviews84.4% of reviews—
Number of ratings39K — better1
Update frequencyEvery 5 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
Best chart rank#61 — better—
DevicesiPhone, iPadiPhone, iPod
Requires iOS1715.0 — better
Further details — not scored
Size456 MB9 MB
Age rating4+4+
DeveloperNoctua Software LtdInteria.pl sp. z o.o.

Customer experience

Stellarium Mobile

All ratings38,274 ratings
Positive96.8%
Neutral1.7%
Negative1.5%
Written reviews620 reviews
Positive84.4%
Neutral5.6%
Negative10.0%

SKUL

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Stellarium Mobile

Reported bugs

3 issues
  • Compass not working properly
  • Favorites list disappearing
  • Inconsistent performance on different devices

Requested features

5 requests
  • Notifications for astronomical events
  • More customization options
  • Integration with camera for AR overlay
  • Better support for telescopes and mounts
  • Improved search and navigation

SKUL

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Stellarium Mobile

Subscriptions1
  • Stellarium PLUS7 Days trial$1.991 Month
One-time1
  • Stellarium PLUS$18.99
None

SKUL

No in-app purchases

Questions

Is Stellarium Mobile free?
Stellarium Mobile is free to download, with in-app purchases available.
Is SKUL free?
SKUL is free to download, with no in-app purchases.
Which has better reviews, Stellarium Mobile or SKUL?
SKUL is rated higher. Stellarium Mobile averages 4.8 out of 5 from 39K ratings, while SKUL averages 5.0 from 1 ratings.
Do Stellarium Mobile or SKUL have ads?
Neither Stellarium Mobile nor SKUL shows ads.
Which is updated more often, Stellarium Mobile or SKUL?
Stellarium Mobile ships an update every 5 weeks, and SKUL every 2 months. Most recently, Stellarium Mobile was updated on October 26, 2026 and SKUL on October 24, 2026.

Other comparisons