# Solar Walk vs Space 4D+

The clearest difference is price: Space 4D+ at Free against Solar Walk's $4.99. Space 4D+ also leads on in-app purchases (none vs 11) and update cadence (every 2 months vs every 5 months). Solar Walk's advantage is rating (4.7 vs 3.4) and review sentiment (72% vs 37%). On ads and device support there is nothing between them.

Space 4D+ is free to download; Solar Walk costs $4.99 up front. Solar Walk sells 11 one-off in-app purchases. Space 4D+ asks for nothing beyond the download.

Solar Walk holds the better App Store score, 4.7 against 3.4. That said, the two scores are not equally well evidenced: Solar Walk has 8.1K ratings behind it against 46, so its average is the more settled of the two. Written reviews point the same way: 72% of Solar Walk's written reviews are positive against 37% of Space 4D+'s.

Solar Walk ships an update every 5 months, Space 4D+ every 2 months. The most recent releases landed on September 24, 2026 and June 11, 2026 respectively.

## The numbers

| Metric | Solar Walk | Space 4D+ |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[4.7 (8.1K ratings)](https://appshunter.io/ios/app/solar-walk-space-simulator-3d/id347546771/reviews)** | [3.4 (46 ratings)](https://appshunter.io/ios/app/space-4d-plus/id1018109847/reviews) |
| Number of ratings | **8.1K** | 46 |
| Positive reviews | **72.2% of reviews** | 36.8% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 451 MB | 300 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Vito Technology Inc.](https://appshunter.io/developer/289641503) | [Octagon Studio Ltd](https://appshunter.io/developer/998405180) |

## What reviewers say

### Solar Walk

[App page](https://appshunter.io/ios/app/solar-walk-space-simulator-3d/id347546771)

Explore a detailed 3D model of our solar system and the universe. Interact with planets, moons, and satellites, and take virtual flights through space. Travel through time to see the universe's past and learn with educational movies.

**Highlights:** Interactive 3D solar system model, Virtual flights between celestial bodies, Time travel feature for historical views, Educational movies about space, Orrery and true-to-scale view modes, Milky Way Galaxy view

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

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mission of Cassini-Huygens | Free | one-time |
| Cycles of the Earth System | Free | one-time |
| Major Circles of Latitude | Free | one-time |
| Movies Bundle | Free | one-time |
| 3D Satellites in Real Time | Free | one-time |
| Planets of the Solar System | Free | one-time |
| What is a Solar Eclipse? | Free | one-time |
| The Moon Phases Explanation | Free | one-time |
| Zodiacal Constellations | Free | one-time |
| High Resolution Bundle | $1.99 | one-time |
| All Additional Content - Sale | $2.99 | one-time |

**What reviewers like**

- 🌟 Excellent graphics and visuals
- 🔍 Detailed information about the solar system
- 🌍 Ability to explore the planets and moons
- 🎥 Informative videos and animations
- 🧠 Educational and informative for all ages

**What reviewers complain about**

- 💰 Expensive in-app purchases required to unlock full features
- 🐛 Bugs and crashes reported, especially after updates
- 🕹️ Navigation and controls can be unintuitive
- 🌌 Limited to just the solar system, no other galaxies or deep space

**Reported bugs**

- App crashes on launch for some users
- In-app purchases not working correctly
- Freezing and performance issues on older devices
- Incorrect planet/moon positioning and timing

**Requested features**

- Add more planets, moons, and objects to the solar system
- Expand to include other star systems and galaxies
- Improve navigation and controls for easier exploration
- Offer more free content instead of paid add-ons
- Fix reported bugs and crashes


### Space 4D+

[App page](https://appshunter.io/ios/app/space-4d-plus/id1018109847)

Explore the wonders of space with augmented reality flashcards. This app brings planets, satellites, and space missions to life with interactive 3D models and informative facts. Experience space like never before, engaging for both children and adults.

**Highlights:** Augmented reality space exploration, Interactive 3D models of celestial bodies, Informative facts about planets and missions, Engaging for all ages, Scans printed space cards

**In-app purchases:** none


## Frequently asked questions

### Is Solar Walk free?

Solar Walk costs $4.99, and also offers in-app purchases.

### Is Space 4D+ free?

Space 4D+ is free to download, with no in-app purchases.

### Which has better reviews, Solar Walk or Space 4D+?

Solar Walk is rated higher. Solar Walk averages 4.7 out of 5 from 8.1K ratings, while Space 4D+ averages 3.4 from 46 ratings.

### Do Solar Walk or Space 4D+ have ads?

Neither Solar Walk nor Space 4D+ shows ads.

### Which is updated more often, Solar Walk or Space 4D+?

Solar Walk ships an update every 5 months, and Space 4D+ every 2 months. Most recently, Solar Walk was updated on September 24, 2026 and Space 4D+ on June 11, 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.*