Comparison

Exoplanet Explorer vs Solar System&Celestial Objects

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

Head to head
About

Exoplanet Explorer

Explore a vast catalog of over 6,000 confirmed exoplanets with detailed scientific data. Compare worlds, visualize habitable zones, and track new discoveries. Ideal for stargazers, students, educators, and researchers.

Highlights
  • 6,000+ confirmed exoplanets
  • Detailed scientific data
  • Advanced filtering and sorting
  • Planet comparison tool
  • Habitable zone analysis
  • Home screen widgets
  • Apple Watch companion app
Features
Read full description

Explore the universe of exoplanets — over 6,000 confirmed worlds orbiting distant stars, updated from leading scientific archives. Track new discoveries as they happen and dive into the data behind every planet. EXPLORE THE COSMOS Search, filter, and sort the complete catalogue of confirmed exoplanets. Find planets by discovery method, star type, orbital characteristics, or habitability potential. Every entry includes detailed scientific data from peer-reviewed sources. ATMOSPHERIC SPECTRA Browse JWST and Hubble transmission spectra for planets where atmospheric data is available. Toggle molecular overlays for CO2, CH4, H2O, CO and more to see which absorption features have been detected. 3D SYSTEM VIEW Step into a planetary system in 3D — see each planet's orbit around its host star with realistic shading and a visualisation of the habitable zone. On iPhone and iPad you can also place a system into your environment in AR. COMPARE WORLDS Analyze exoplanets side-by-side — or compare them with Solar System planets like Earth, Jupiter, and Mars. Compare sizes, masses, orbital periods, star properties, and habitability scores to understand what makes each world unique. HABITABLE ZONE VISUALIZATION See exactly where planets orbit within their star's habitable zone — the region where liquid water could exist. Identify potentially Earth-like worlds and understand the conditions for life beyond our solar system. FEATURES • 6,000+ confirmed exoplanets with detailed scientific data • Atmospheric spectra with molecular overlays • 3D system view with AR mode • Advanced filtering and sorting • Planet comparison tool with Solar System reference • Habitable zone analysis • Spotlight search with deep linking • Home screen widgets • Apple Watch companion app • Bookmark favorites with iCloud sync • Available on iPhone, iPad, Mac, Apple Watch, and Apple Vision Pro GO PREMIUM Enjoying the app? Premium takes it further — unlimited bookmarks, the full planet comparison tool, and additional widgets. A small yearly upgrade that makes a big difference. Whether you're a curious stargazer, student, educator, or researcher, Exoplanet Explorer puts the cosmos in your pocket. Terms of Use (EULA): https://the-exoplanets.space/eula/ Privacy Policy: https://the-exoplanets.space/privacy/

About

Solar System&Celestial Objects

Features
Read full description

Easy learning about solar system, stars, celestial objects, constellations, spacecraft with pictures ,sounds and quiz games. If you who always search and learn a quiz app like these, this app is for you ① Solar system Flash card app. ② Stars Quiz app. ③ Celestial objects quiz app. ④ Stars history and information app. ⑤ Constellations name cards. ⑥ Guess solar system app. Features: - You can learn many kinds of stars. - You can play solar system quiz. - Many information related to solar system, stars, celestial objects, constellations, spacecraft - Support Quiz feature. - Support 5 languages: English, Japanese, Korean, Chinese, Vietnamese

Screenshots

Exoplanet Explorer4 screens
Solar System&Celestial Objects4 screens

Verdict

The call

The clearest difference is in-app purchases: Solar System&Celestial Objects at none against Exoplanet Explorer's 4. Solar System&Celestial Objects also leads on iOS requirement (12.0 vs 17.6). Exoplanet Explorer's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 6 weeks). On price 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. Exoplanet Explorer sells 4 in-app purchases, starting at $2.99 per 3 months. Solar System&Celestial Objects asks for nothing beyond the download.

UpkeepUpdate frequency

Exoplanet Explorer ships an update every 2 weeks, Solar System&Celestial Objects every 6 weeks. The most recent releases landed on October 11, 2026 and October 2, 2026 respectively.

Scorecard5 real differences · 5 level
Exoplanet Explorer versus Solar System&Celestial Objects: the parameters behind the verdict, then further details
ParameterExoplanet ExplorerSolar System&Celestial Objects
PriceFreeFree
Rating4.6 (70 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings70 — better—
Update frequencyEvery 2 weeks — betterEvery 6 weeks
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhone, iPad, Mac, Apple Watch, Vision Pro — betteriPhone, iPad, iPod
Requires iOS17.612.0 — better
Further details — not scored
Size169 MB62 MB
Age rating4+4+
DeveloperCarsten KnoblichNIKI TECH

In-app purchases

4 purchases

Exoplanet Explorer

Subscriptions2
  • 3 months subscription7 Days trial$2.993 Months
  • 12 months subscription7 Days trial$6.991 Year
One-time2
  • Big supporting tip$2.99
  • Really big supporting tip$4.99
None

Solar System&Celestial Objects

No in-app purchases

Questions

Is Exoplanet Explorer free?
Exoplanet Explorer is free to download, with in-app purchases available.
Is Solar System&Celestial Objects free?
Solar System&Celestial Objects is free to download, with no in-app purchases.
Do Exoplanet Explorer or Solar System&Celestial Objects have ads?
Solar System&Celestial Objects shows ads; Exoplanet Explorer does not.
Which is updated more often, Exoplanet Explorer or Solar System&Celestial Objects?
Exoplanet Explorer ships an update every 2 weeks, and Solar System&Celestial Objects every 6 weeks. Most recently, Exoplanet Explorer was updated on October 11, 2026 and Solar System&Celestial Objects on October 2, 2026.

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