# Space 4D+ vs Solar Walk 2

The clearest difference is price: Space 4D+ at Free against Solar Walk 2's $2.99. Space 4D+ also leads on in-app purchases (none vs 7). Solar Walk 2's advantage is rating (4.7 vs 3.4) and review sentiment (75% vs 37%). On update cadence, ads, device support and iOS requirement there is nothing between them.

Space 4D+ is free to download; Solar Walk 2 costs $2.99 up front. Solar Walk 2 sells 7 one-off in-app purchases. Space 4D+ asks for nothing beyond the download.

Solar Walk 2 holds the better App Store score, 4.7 against 3.4. That said, the two scores are not equally well evidenced: Solar Walk 2 has 7.3K ratings behind it against 46, so its average is the more settled of the two. Written reviews point the same way: 37% of Space 4D+'s written reviews are positive against 75% of Solar Walk 2's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on June 11, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Space 4D+ | Solar Walk 2 |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | [3.4 (46 ratings)](https://appshunter.io/ios/app/space-4d-plus/id1018109847/reviews) | **[4.7 (7.3K ratings)](https://appshunter.io/ios/app/solar-walk-2-view-planets-3d/id1031155880/reviews)** |
| Number of ratings | 46 | **7.3K** |
| Positive reviews | 36.8% of reviews | **74.9% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | **Free** | Free with in-app purchases |
| Best chart rank | — | **#145** |
| Size | 300 MB | 803 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple TV** |
| Age rating | 4+ | 4+ |
| Developer | [Octagon Studio Ltd](https://appshunter.io/developer/998405180) | [Vito Technology Inc.](https://appshunter.io/developer/289641503) |

## What reviewers say

### 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


### Solar Walk 2

[App page](https://appshunter.io/ios/app/solar-walk-2-view-planets-3d/id1031155880)

**Currently charting:** #145 Top Paid · Education (US App Store)

Explore our Solar System with detailed 3D models of planets, moons, and spacecraft. Discover celestial events, track space missions, and travel through time and space with an interactive encyclopedia. Stay updated with the latest astronomy news.

**Highlights:** 3D Solar System model, Interactive space encyclopedia, Astronomy calendar, Time and space travel, Space mission tracking, 360-degree panoramic images

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access for a month | $0.99 | one-time |
| Premium Access for 3 months | $1.99 | one-time |
| Premium Access for 6 months | $2.99 | one-time |
| Premium Access: Special Offer | $2.99 | one-time |
| Access for Solar Walk users | $4.99 | one-time |
| Premium Access for a year | $5.99 | one-time |
| Space Exploration Encyclopedia | $8.99 | one-time |

**What reviewers like**

- 🚀 Immersive experience
- 🌟 Stunning graphics
- 💡 Detailed information on celestial bodies
- 👍 Educational and informative
- ⭐ Visually stunning

**What reviewers complain about**

- 🐛 Inconsistent zooming behavior
- 💰 Locked content behind paywall
- 🔍 Difficult to navigate
- 🔍 Outdated information on missions and satellites

**Reported bugs**

- Crashes on Apple Watch
- Difficulty applying real-time settings

**Requested features**

- Add more minor moons and dwarf planets
- Improve zoom functionality to allow for smoother transitions
- Integrate more up-to-date information on space missions and satellites
- Add support for exoplanets, black holes, and the Milky Way galaxy
- Implement a free-flight mode to explore the solar system freely


## Frequently asked questions

### Is Space 4D+ free?

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

### Is Solar Walk 2 free?

Solar Walk 2 costs $2.99, and also offers in-app purchases.

### Which has better reviews, Space 4D+ or Solar Walk 2?

Solar Walk 2 is rated higher. Space 4D+ averages 3.4 out of 5 from 46 ratings, while Solar Walk 2 averages 4.7 from 7.3K ratings.

### Do Space 4D+ or Solar Walk 2 have ads?

Neither Space 4D+ nor Solar Walk 2 shows ads.

### Which is updated more often, Space 4D+ or Solar Walk 2?

Space 4D+ ships an update every 2 months, and Solar Walk 2 every 2 months. Most recently, Space 4D+ was updated on June 11, 2026 and Solar Walk 2 on September 25, 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.*