# Mars Book vs StarParade

The clearest difference is in-app purchases: Mars Book at none against StarParade's 1. Mars Book also leads on iOS requirement (9.0 vs 13.0). StarParade's advantage is update cadence (every 4 days vs every 13 months). On price, ads and device support there is nothing between them.

Both are free to download. StarParade sells 1 one-off in-app purchase. Mars Book asks for nothing beyond the download.

Mars Book ships an update every 13 months, StarParade every 4 days. The most recent releases landed on October 13, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Mars Book | StarParade |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 4 days** |
| Size | 14 MB | 25 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Vixen Co.,Ltd.](https://appshunter.io/developer/536188843) | [Tomohiko Onishi](https://appshunter.io/developer/1889063817) |

## What reviewers say

### Mars Book

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

**In-app purchases:** none


### StarParade

[App page](https://appshunter.io/ios/app/starparade-ar/id6761880239)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro プラン | $3.99 | one-time |


## Frequently asked questions

### Is Mars Book free?

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

### Is StarParade free?

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

### Do Mars Book or StarParade have ads?

Neither Mars Book nor StarParade shows ads.

### Which is updated more often, Mars Book or StarParade?

Mars Book ships an update every 13 months, and StarParade every 4 days. Most recently, Mars Book was updated on October 13, 2026 and StarParade 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.*