AGILEScience vs Stellar Tour
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AGILEScience
Explore the universe's energetic phenomena and Earth's atmospheric events. Discover black holes, neutron stars, and gamma-ray flashes from space. This app provides news, a gallery of discoveries, and real-time satellite location.
- Universe exploration
- Earth science insights
- News updates
- Discovery gallery
- Real-time satellite position
- Scientific publications
Read full descriptionHide full description
"AGILE: from Black Holes to the Earth" AGILE is a satellite of the Italian Space Agency (ASI) dedicated to unveiling the most exciting mysteries of our Universe. Black holes, neutron stars, stellar explosions, very far galaxies from deep space and other exotic cosmic sources emit very energetic radiation (gamma-rays) that AGILE is able to detect in orbit. Launched in 2007, the satellite is currently observing the Universe with many surprises and crucial discoveries. AGILE contributes also to the study of the Earth having detected hundreds of "terrestrial gamma-ray flashes" associated with lighnting in energetic thunderstorms. Their impact for the environment is under study. Thus, AGILE reaches the frontiers of our knowledge for both the remote cosmos and our planet Earth, a very important synergy for our society. The AGILE project is the result of the collaboration between ASI, the Italian Institute of Astrophysics (INAF), and the Italian Institute of Nuclear Physics (INFN). Several Italian universities participate in the program (Rome-1, Rome-2, Trieste, Pavia), as well as space companies including CGS, Oerlikon-Contraves, Thales-Alenia Space (ex Laben), Galileo Avionica, and Mipot. This APP presents an overview of the AGILE exciting results: it is a window for exploring the most energetic phenomena of our Universe. Developed by Nicolò Parmiggiani (Università di Modena e Reggio) in collaboration with INAF/IASF Bologna the AGILE App features different tabs: 1) NEWS: the most important news related to the AGILE space mission. 2) GALLERY: a collection of videos of the main discoveries, of photos of the satellite construction and launch campaign, and of maps showing the gamma-ray universe as seen by AGILE. 3) TOP: the most important scientific discoveries. 4) MORE: including the following sections: 4.1) Position: AGILE location in orbit (displayed in real-time). 4.2) ATEL/GCN: the complete list of the AGILE Astronomical Telegrams and GCN Circulars. 4.3) AT reserved section.
Stellar Tour
Explore the cosmos with an augmented reality stargazing app guided by an astrophysicist. Discover exoplanets, solar system bodies, and deep-sky objects with scientifically accurate narratives and detailed visuals.
- Augmented reality stargazing
- Astrophysicist-guided tours
- Detailed exoplanet information
- High-resolution solar system visuals
- Exploration of galaxies and nebulae
- Interactive 3D planet and moon models
Read full descriptionHide full description
Stellar Tour is the only AR stargazing app written by an astrophysicist. Point your phone at the night sky and get a guided tour of everything up there: 1.7 billion real stars, every planet and major moon, eclipses, meteor showers, 13,000 deep-sky objects, and a course in astronomy that starts with the sky over your head and ends at the edge of the universe. Astrophysicist Dr. Aaron Day wrote every word. Instead of the standard flood of random facts, Stellar Tour tells the scientifically accurate story of each world: what it is like on the ground, in the seas, or floating through the clouds. THE NIGHT SKY, FOR REAL • 1.7 billion stars from ESA's Gaia survey, each in its true position. Pinch to zoom from your backyard to the galactic core. • The Milky Way as it actually looks, drawn from every star Gaia measured, with constellations, planets, and satellites overlaid on your live sky. • A sky that looks like the time it is: dawn, daylight, twilight, and full dark, with a real atmosphere and hazy ridges on the horizon. The Moon shows its earthshine, and Earth's night side its city lights. • Night Vision mode keeps your eyes dark-adapted with a pure red display. LEARN THE SKY • Fifteen short lessons, from the sky over your head to the edge of the universe. Every stop is a live visit: the lesson flies you to the star, steps the clock, or opens the tool it is talking about. The first three lessons are free. • Three reference books inside the app, How We Know, The Sky, and The Whole Story, with a glossary and dozens of labeled diagrams. SEVEN SKIES • See the stars the way Japan, China, Korea, Vietnam, India, and the Arabian desert saw them: their star figures and folk names drawn on your sky, their stories on each star's page, and their lunar festivals on the calendar. PLAN YOUR NIGHT • Sky Calendar: every eclipse, meteor shower, conjunction, and full moon, filtered by type. The week ahead is free; the full year comes with the expansion. • Night Planner: the best targets for your sky tonight, hour by hour. Sky Forecast: the cloud cover over your spot, hour by hour. • Reminders that fire only when something is worth stepping outside for, including ISS and Tiangong passes with a live countdown. • Home Screen and Lock Screen widgets for rise and set times and the next sky event. Ask Siri what is visible tonight. ECLIPSE EXPLORER Simulate any solar or lunar eclipse from any place on Earth: local timings, a disc animation of the Moon crossing the Sun, and a live countdown. The next solar eclipse at your own location is free: its times, what you will see there, and a reminder. GO DEEPER • Telescope Catalog: 13,000 NGC, IC, and Messier objects, searchable and shown on your sky. • Exoplanets: nearly every known world, in its actual position on the sky, with sizes, temperatures, and orbits. • The Solar System up close: planets and major moons in NASA probe imagery, in visible light, ultraviolet, infrared, and radar. Rotate them to any angle. • Hubble and James Webb Space Telescope pictures, on the pages of the objects they show. FOR EVERYONE • Kid Mode rewrites the whole tour for explorers aged five to seven. • Birthday Sky: a shareable card of the sky on the night you were born. • Smart search: ask for exactly what you want. • Fifteen languages: English, Spanish, French, German, Italian, Portuguese, Russian, Japanese, Korean, Simplified and Traditional Chinese, Arabic, Hindi, Vietnamese, and Icelandic. Dates in your own calendar. • VoiceOver and Dynamic Type throughout. ONE PURCHASE, NO SUBSCRIPTION Cosmic Expansion adds the planner, the catalog, the eclipses, the exoplanets, the galaxies, the full year of the calendar, and the whole course in a single purchase that is yours forever. Take the Stellar Tour!
Screenshots
Verdict
The clearest difference is in-app purchases: AGILEScience at none against Stellar Tour's 6. AGILEScience also leads on review sentiment (100% vs 84%) and iOS requirement (8.0 vs 26.0). Stellar Tour's advantage is update cadence (fortnightly vs every 3 months). On price, 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
Both are free to download. Stellar Tour sells 5 one-off in-app purchases. AGILEScience asks for nothing beyond the download.
AGILEScience ships an update every 3 months, Stellar Tour fortnightly. The most recent releases landed on September 26, 2026 and October 8, 2026 respectively.
| Parameter | AGILEScience | Stellar Tour |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.7 (1.7K ratings) — better |
| Positive reviews | 100.0% of reviews — better | 83.5% of reviews |
| Number of ratings | — | 1.7K — better |
| Update frequency | Every 3 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 8.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 27 MB | 570 MB |
| Age rating | 4+ | 4+ |
| Developer | Andrea Bulgarelli | Aaron Day |
Customer experience
AGILEScience
Stellar Tour
Bugs and requests
AGILEScience
Not enough reviews yet to summarise bugs or requests.
Stellar Tour
Reported bugs
3 issues- Login screen freezes
- Compatibility issues with newer iOS versions
- Videos not playing offline as expected
Requested features
4 requests- Add support for viewing comets and other celestial events
- Improve AR functionality and integration
- Provide more detailed information on exoplanets
- Introduce a dark mode option for better visibility at night
In-app purchases
AGILEScience
No in-app purchases
Stellar Tour
- Remove Ads 1$2.99
- Upgrade: Lessons & Sky Tools$3.99
- Cosmic Expansion2 variants$9.99
Show 2 moreShow fewer
- Remove Ads 2$9.99
- Remove Ads 3$14.99
Questions
Is AGILEScience free?
Is Stellar Tour free?
Do AGILEScience or Stellar Tour have ads?
Which is updated more often, AGILEScience or Stellar Tour?
Other comparisons















