# solAR vs OddBook Universe

The clearest difference is in-app purchases: OddBook Universe at none against solAR's 1. OddBook Universe also leads on review sentiment (100% vs 67%) and rating (5.0 vs 4.6). solAR's advantage is ratings volume (2.1K vs 8) and iOS requirement (14.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. solAR sells 1 one-off in-app purchase. OddBook Universe asks for nothing beyond the download.

OddBook Universe holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: solAR has 2.1K ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 67% of solAR's written reviews are positive against 100% of OddBook Universe's.

solAR ships an update every 3 months, OddBook Universe every 4 weeks. The most recent releases landed on October 26, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | solAR | OddBook Universe |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (2.1K ratings)](https://appshunter.io/ios/app/solar-solar-system-in-ar/id1286558019/reviews) | **[5.0 (8 ratings)](https://appshunter.io/ios/app/oddbook-universe/id1577225310/reviews)** |
| Number of ratings | **2.1K** | 8 |
| Positive reviews | 67.4% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 43 MB | 62 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Mac, Vision Pro** | iPhone, iPad, Mac, Vision Pro |
| Age rating | 4+ | 12+ |
| Developer | [Michael Stoeckli](https://appshunter.io/developer/368788110) | [Ryan Rook](https://appshunter.io/developer/1524236601) |

## What reviewers say

### solAR

[App page](https://appshunter.io/ios/app/solar-solar-system-in-ar/id1286558019)

Explore the solar system in 3D and augmented reality. View planets, moons, and the sun in high resolution, placing them in your real-world environment. Adjust distances and scales for an immersive educational experience.

**Highlights:** Augmented reality solar system exploration, High-resolution 3D models of planets and moons, Place celestial bodies in real-world environments, Adjustable planet and moon scale, Interactive learning about space, Intuitive gesture controls

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Activate all Celestial Bodies | $4.99 | one-time |

**What reviewers like**

- 🚀 Realistic and detailed planets
- 👍 Easy to use and intuitive interface
- 🌟 Great AR implementation
- 💡 Helpful for learning about the solar system

**What reviewers complain about**

- 💰 Paid content required to access full features
- 🐛 Bugs and glitches, especially after updates
- ⚠️ Inaccurate scale and proportions of planets/moons
- 🔧 Settings and controls not always intuitive

**Reported bugs**

- Planets not rendering properly in iOS 16
- Purchased content not unlocking correctly
- Frequent crashes and performance issues

**Requested features**

- Add more planets and dwarf planets
- Improve accuracy of scale and orbital mechanics
- Provide more educational information about planets
- Allow free access to full solar system view


### OddBook Universe

[App page](https://appshunter.io/ios/app/oddbook-universe/id1577225310)

This app is a comprehensive fan resource for all things Oddworld. It provides detailed information on games, characters, and locations, along with a timeline to track your progress. Stay connected with the official Oddworld community through integrated social media links.

**Highlights:** Oddworld game details, Character and location information, Game completion tracker, Official social media links, Community access

**In-app purchases:** none


## Frequently asked questions

### Is solAR free?

solAR is free to download, with in-app purchases available.

### Is OddBook Universe free?

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

### Which has better reviews, solAR or OddBook Universe?

OddBook Universe is rated higher. solAR averages 4.6 out of 5 from 2.1K ratings, while OddBook Universe averages 5.0 from 8 ratings.

### Do solAR or OddBook Universe have ads?

Neither solAR nor OddBook Universe shows ads.

### Which is updated more often, solAR or OddBook Universe?

solAR ships an update every 3 months, and OddBook Universe every 4 weeks. Most recently, solAR was updated on October 26, 2026 and OddBook Universe on October 10, 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.*