# Earth vs Hello Mars

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.

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.

## The numbers

| Metric | Earth | Hello Mars |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (42 ratings)](https://appshunter.io/ios/app/earth-now/id494633346/reviews)** | [3.6 (22 ratings)](https://appshunter.io/ios/app/hello-mars/id1097625079/reviews) |
| Number of ratings | **42** | 22 |
| Positive reviews | **73.7% of reviews** | 57.1% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 days** |
| Monetization | Free | Free |
| Size | 181 MB | 227 MB |
| Requires iOS | 13.0 | **6.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jet Propulsion Laboratory](https://appshunter.io/developer/347075767) | [Lockheed Martin](https://appshunter.io/developer/400687539) |

## What reviewers say

### Earth

[App page](https://appshunter.io/ios/app/earth-now/id494633346)

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.

**Highlights:** 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

**In-app purchases:** none

**What reviewers like**

- 🌍 Real-time Earth data visualization
- 👍 User-friendly interface and easy navigation
- 🎨 Beautiful and mesmerizing graphics
- 📊 Comprehensive satellite data from NASA/JPL
- 🆓 Free access to scientific information

**What reviewers complain about**

- 🐛 Frequent crashes on older devices
- ⏳ Slow loading times on poor internet
- 🔍 Difficult to understand without scientific background
- 🗺️ Antarctica and polar regions blacked out/missing
- 📐 Zooming and scrolling too sensitive

**Reported bugs**

- 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

**Requested features**

- Celsius/Kelvin temperature unit options
- Satellite information (height, launch date)
- ISS tracking capability
- Ocean current visualization
- Ice sheet data layers


### Hello Mars

[App page](https://appshunter.io/ios/app/hello-mars/id1097625079)

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.

**Highlights:** Real-time weather from Curiosity Rover, Accurate planetary tracking, Share experiences on social media, Explore Mars on your phone

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Earth free?

Earth is free to download, with no in-app purchases.

### Is Hello Mars free?

Hello Mars is free to download, with no in-app purchases.

### Which has better reviews, Earth or Hello Mars?

Earth is rated higher. Earth averages 4.6 out of 5 from 42 ratings, while Hello Mars averages 3.6 from 22 ratings.

### Do Earth or Hello Mars have ads?

Neither Earth nor Hello Mars shows ads.

### Which is updated more often, Earth or Hello Mars?

Earth ships an update every 4 months, and Hello Mars every 3 days. Most recently, Earth was updated on October 20, 2026 and Hello Mars on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*