# Hubble vs Discover Mars

The clearest difference is review sentiment: Discover Mars at 100% against Hubble's 0%. Discover Mars also leads on rating (5.0 vs 4.4) and ads (none vs shown). On price, ratings volume, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Discover Mars holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 9 and 12 respectively. Written reviews point the same way: 0% of Hubble's written reviews are positive against 100% of Discover Mars's.

Hubble ships an update every 5 months, Discover Mars monthly. Both last shipped on November 3, 2026.

## The numbers

| Metric | Hubble | Discover Mars |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (9 ratings)](https://appshunter.io/ios/app/hubble-deep-space/id1545745146/reviews) | **[5.0 (12 ratings)](https://appshunter.io/ios/app/discover-mars/id1550710909/reviews)** |
| Number of ratings | 9 | **12** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | Ad-supported | **Free** |
| Size | 2.9 GB | 8 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 9+ | 4+ |
| Developer | [Alparslan Topbas](https://appshunter.io/developer/1130875171) | [Manthan B Thakkar](https://appshunter.io/developer/1550710911) |

## What reviewers say

### Hubble

[App page](https://appshunter.io/ios/app/hubble-deep-space/id1545745146)

Explore the universe in high definition with stunning images from the Hubble Space Telescope. Discover galaxies, nebulae, and star clusters with detailed descriptions and an immersive slideshow experience. Stay updated with the latest cosmic discoveries.

**Highlights:** High-resolution cosmic image gallery, Immersive slideshow mode, Searchable database of celestial objects, Detailed scientific descriptions, Real-time updates for 'Picture of the Week', Links to NASA/ESA archives

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases:** none


### Discover Mars

[App page](https://appshunter.io/ios/app/discover-mars/id1550710909)

Explore stunning, high-definition images captured on Mars by NASA rovers. View the latest photos, zoom in for detail, and learn fascinating facts about the Red Planet's atmosphere, gravity, and temperature.

**Highlights:** View latest Mars rover images, Slideshow mode for full-screen viewing, Zoom into high-definition photos, Save images to your device, Explore Mars' atmosphere, gravity, and temperature

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Hubble free?

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

### Is Discover Mars free?

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

### Which has better reviews, Hubble or Discover Mars?

Discover Mars is rated higher. Hubble averages 4.4 out of 5 from 9 ratings, while Discover Mars averages 5.0 from 12 ratings.

### Do Hubble or Discover Mars have ads?

Hubble shows ads; Discover Mars does not.

### Which is updated more often, Hubble or Discover Mars?

Hubble ships an update every 5 months, and Discover Mars monthly. Most recently, Hubble was updated on November 3, 2026 and Discover Mars on November 3, 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.*