# Our Solar System vs bbitbbitbook

The clearest difference is review sentiment: bbitbbitbook at 79% against Our Solar System's 0%. bbitbbitbook also leads on update cadence (every 10 days vs every 6 weeks). Our Solar System's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. bbitbbitbook sells 1 one-off in-app purchase. Our Solar System asks for nothing beyond the download.

Our Solar System ships an update every 6 weeks, bbitbbitbook every 10 days. Both last shipped on September 26, 2026.

## The numbers

| Metric | Our Solar System | bbitbbitbook |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/our-solar-system/id1222838950/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 0.0% of reviews | **78.9% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Every 10 days** |
| Monetization | **Free** | Ad-supported |
| Size | 770 MB | 102 MB |
| Requires iOS | **8.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Alzzam Education Corp.](https://appshunter.io/developer/868032382) | [SunHyeob Kim](https://appshunter.io/developer/946982071) |

## What reviewers say

### Our Solar System

[App page](https://appshunter.io/ios/app/our-solar-system/id1222838950)

Explore planets and probes in augmented reality, virtual reality, and hologram modes. This app provides detailed information about celestial bodies within our solar system.

**Highlights:** Augmented reality planet and probe exploration, Virtual reality solar system view, Hologram mode for celestial body information, Detailed planet and probe data, Interactive educational content

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

**In-app purchases:** none


### bbitbbitbook

[App page](https://appshunter.io/ios/app/bbitbbitbook/id1671783078)

This app helps you track your reading habits by allowing you to log books, add notes with photos, and view reading statistics. Earn rewards and collect characters as you build your personal digital library.

**Highlights:** Book logging and search, Add notes with photos and OCR, Reading schedule and reminders, Digital reading journal with rewards, Reading statistics and graphs, Collectible characters

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 광고 제거 | $1.99 | one-time |


## Frequently asked questions

### Is Our Solar System free?

Our Solar System is free to download, with no in-app purchases.

### Is bbitbbitbook free?

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

### Do Our Solar System or bbitbbitbook have ads?

bbitbbitbook shows ads; Our Solar System does not.

### Which is updated more often, Our Solar System or bbitbbitbook?

Our Solar System ships an update every 6 weeks, and bbitbbitbook every 10 days. Most recently, Our Solar System was updated on September 26, 2026 and bbitbbitbook on September 26, 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.*