# Mars Book vs Pocket Planets

The clearest difference is ads: Mars Book at none against Pocket Planets's shown. Mars Book also leads on iOS requirement (9.0 vs 12.0). Pocket Planets's advantage is update cadence (every 3 weeks vs every 13 months). On price, 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.

Mars Book ships an update every 13 months, Pocket Planets every 3 weeks. The most recent releases landed on September 28, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Mars Book | Pocket Planets |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (22 ratings)](https://appshunter.io/ios/app/pocket-planets/id1496547610/reviews)** |
| Number of ratings | — | **22** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 13 months | **Every 3 weeks** |
| Monetization | — | Ad-supported |
| Size | 14 MB | 66 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Vixen Co.,Ltd.](https://appshunter.io/developer/536188843) | [Ad Lunam Kereskedelmi es Szolgaltato Korlatolt Felelossegu Tarsasag](https://appshunter.io/developer/1496547609) |

## What reviewers say

### Mars Book

[App page](https://appshunter.io/ios/app/mars-book/id1342509724)

**In-app purchases:** none


### Pocket Planets

[App page](https://appshunter.io/ios/app/pocket-planets/id1496547610)

Explore our solar system with detailed information on planets, moons, and astronauts. Track who is currently in space and receive notifications for new launches. Access NASA images and compare celestial body characteristics.

**Highlights:** Detailed planet and moon data, Astronaut information and missions, Real-time space occupancy, Launch notifications, NASA image gallery, Celestial body comparisons

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

**In-app purchases:** none


## Frequently asked questions

### Is Mars Book free?

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

### Is Pocket Planets free?

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

### Do Mars Book or Pocket Planets have ads?

Pocket Planets shows ads; Mars Book does not.

### Which is updated more often, Mars Book or Pocket Planets?

Mars Book ships an update every 13 months, and Pocket Planets every 3 weeks. Most recently, Mars Book was updated on September 28, 2026 and Pocket Planets on October 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.*