Earth vs Hello Mars
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Earth
Visualize global climate data from NASA satellites, including temperature, CO2, and sea level. Explore 3D Earth models with interactive controls and color-coded maps to understand environmental conditions.
- Global climate data visualization
- Satellite data from Earth Science
- Surface air temperature maps
- CO2 and CO levels
- Ozone and water vapor data
- Gravity and sea level variations
- Interactive 3D Earth model
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NASA's Earth Now is an application that visualizes recent global climate data from Earth Science satellites, including surface air temperature, carbon dioxide, carbon monoxide, ozone, and water vapor as well as gravity and sea level variations. Data sets are visually described using "false color" maps. Color-coded legends are provided to indicate relative strength or weakness of an environmental condition. The resulting 3D model of the Earth may be rotated by a single finger stroke, and may also be zoomed in or out by pinching 2 fingers. It was developed by the Earth Science Communications and Visualization Technology Applications and Development Teams at NASA's Jet Propulsion Laboratory, with support from NASA Headquarters.
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: Earth at 4.6 against Hello Mars's 3.6. Earth also leads on review sentiment (74% vs 57%). Hello Mars's advantage is update cadence (every 3 days vs every 4 months) and iOS requirement (6.0 vs 13.0). On price, ratings volume, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Earth holds the better App Store score, 4.6 against 3.6. Both are backed by a comparable volume of ratings — 42 and 22 respectively. Written reviews point the same way: 74% of Earth's written reviews are positive against 57% of Hello Mars's.
Earth ships an update every 4 months, Hello Mars every 3 days. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.
| Parameter | Earth | Hello Mars |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (42 ratings) — better | 3.6 (22 ratings) |
| Positive reviews | 73.7% of reviews — better | 57.1% of reviews |
| Number of ratings | 42 — better | 22 |
| Update frequency | Every 4 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 | 6.0 — better |
| Further details — not scored | ||
| Size | 181 MB | 227 MB |
| Age rating | 4+ | 4+ |
| Developer | Jet Propulsion Laboratory | Lockheed Martin |
Customer experience
Earth
Hello Mars
Bugs and requests
Earth
Reported bugs
12 issues- App crashes on startup or during use
- Endless 'Loading model' message
- Crashes on iPhone 4 and older devices
- Pixel doubler requirement on iPad
- No landscape orientation support
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- Doesn't fill iPhone 5 screen properly
- Extremely slow data loading
- Menu navigation issues
- Equator display shows slashes of emptiness
- Zoom sensitivity causes twitchy behavior
- Text readability issues against Earth background
- Geographic data coverage gaps
Requested features
17 requests- Celsius/Kelvin temperature unit options
- Satellite information (height, launch date)
- ISS tracking capability
- Ocean current visualization
- Ice sheet data layers
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- Methane concentration data
- Snapshot/screenshot capability
- Adjustable animation playback speed
- Manual timeline scrolling for animations
- Higher resolution maps for Retina displays
- Landscape orientation support
- iPad version
- Google Earth integration
- More detailed explanations of data
- Selectable date ranges for animations
- Atmospheric CO2 levels (previously removed)
- Surface temperature data (previously removed)
Hello Mars
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Earth
No in-app purchases
Hello Mars
No in-app purchases
