Exoplanet vs Hello Mars
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Exoplanet
Explore a vast, interactive database of discovered exoplanets and their host stars. Visualize their physical properties, locations in the night sky, and orbital paths. Discover the observable universe from Earth to the cosmic microwave background with stunning 3D models and augmented reality features.
- Interactive visualizations and animations
- Daily updated exoplanet and host star properties
- 3D Milky Way model with exoplanet locations
- Augmented reality sky map
- Exoplanet orbit and habitable zone visualizations
- Data from multiple exoplanet catalogs
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Exoplanets are planets orbiting stars beyond our own solar system. This app allows you to explore all discovered exoplanets, their measured physical properties, their location in the night sky, and their host stars. An interactive model shows you the entire observable universe, all the way from the surface of the Earth to the cosmic microwave background. This app has been developed by a professional astronomer. Main features: * Interactive visualizations and animations. * Physical properties of all detected exoplanets and their host stars, updated on a daily basis. * Stunning 3D model of our Milky Way showing the location of all known exoplanets. You can zoom into any planetary system, explore how the night sky and the constellations look from the surface of other planets, or zoom out and see other local galaxies and galaxy clusters as well as the cosmic microwave background. * Visualizations of exoplanet orbits and the habitable zone. * Choose between the Open Exoplanet Catalogue, the NASA Exoplanet Archive, and the Extrasolar Planet Encyclopedia (exoplanet.eu). * Push notifications are sent out whenever a new planet is discovered. * Augmented reality sky map: point the phone towards the sky to find an exoplanet! * Interactive multi-touch correlation plots. * Solar System planets, major moons, and asteroids are included. * Explore S-Stars orbiting the black hole at the Galactic Center of our Milky Way * Background information about exoplanets and detection methods. * Full support of planets in binary, triple, quadruple systems and orphan planets. * Real-time ray tracing on the GPU.
Hello Mars
Explore the stars and journey to Mars with real-time weather data directly from the Curiosity Rover. Track planetary positions and share your cosmic adventures.
- Real-time weather from Curiosity Rover
- Accurate planetary tracking
- Share experiences on social media
- Explore Mars on your phone
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Next stop, Mars. A manned mission to the red planet is happening sooner than you think. That’s why Hello Mars from Lockheed Martin provides a beautiful experience as you search the stars, travel to distant orbits and reach Mars with real-time weather data. Explore Mars – on your phone. Download today. FEATURES: - Get real-time weather direct from Curiosity Rover. - Discover where the planets are with accurate planetary tracking. - Share your experience on Twitter and Facebook.
Screenshots
Verdict
The clearest difference is rating: Exoplanet at 4.7 against Hello Mars's 3.6. Exoplanet also leads on review sentiment (91% vs 57%) and ratings volume (956 vs 22). Hello Mars's advantage is in-app purchases (none vs 7) and update cadence (every 3 days vs every 2 weeks). On price 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
Both are free to download. Exoplanet sells 7 one-off in-app purchases. Hello Mars asks for nothing beyond the download.
Exoplanet holds the better App Store score, 4.7 against 3.6. That said, the two scores are not equally well evidenced: Exoplanet has 956 ratings behind it against 22, so its average is the more settled of the two. Written reviews point the same way: 91% of Exoplanet's written reviews are positive against 57% of Hello Mars's.
Exoplanet ships an update every 2 weeks, Hello Mars every 3 days. The most recent releases landed on October 17, 2026 and October 9, 2026 respectively.
| Parameter | Exoplanet | Hello Mars |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (956 ratings) — better | 3.6 (22 ratings) |
| Positive reviews | 90.9% of reviews — better | 57.1% of reviews |
| Number of ratings | 956 — better | 22 |
| Update frequency | Every 2 weeks | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod, Apple TV — better | iPhone, iPod |
| Requires iOS | 13.0 | 6.0 — better |
| Further details — not scored | ||
| Size | 105 MB | 227 MB |
| Age rating | 4+ | 4+ |
| Developer | Hanno Rein | Lockheed Martin |
Customer experience
Exoplanet
Hello Mars
Bugs and requests
Exoplanet
Reported bugs
2 issues- Upgrade purchase issues with Galaxy Clusters and CMB add-on
- Kepler objects of interest disappearing when switching databases
Requested features
9 requests- Add more detailed textures and visuals for exoplanets
- Ability to view multiple databases simultaneously
- Option to see planet surfaces and atmospheres
- Inclusion of dwarf planets in our solar system
- Ability to zoom in on and explore other galaxies
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- Addition of black holes, pulsars, and other celestial objects
- Inclusion of satellite and spacecraft orbits
- Narration or audio commentary for key discoveries
- Ability to view the universe from the surface of planets
Hello Mars
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Exoplanet
- Galaxy Clusters and CMB$0.99
- Asteroids$0.99
- Gaia Stars$0.99
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- S-Stars$0.99
- Catalogues$0.99
- Developer Appreciation Coffee$1.99
- Kepler Add-on$2.99
Hello Mars
No in-app purchases
