# BootBrain vs ずんだチャイム

The clearest difference is iOS requirement: BootBrain at 13.0 against ずんだチャイム's 16.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

BootBrain ships an update every 8 days, ずんだチャイム every 9 days. The most recent releases landed on September 29, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | BootBrain | ずんだチャイム |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 9 days |
| Size | 50 MB | 185 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [klien](https://appshunter.io/developer/1558821214) | [masatomo ota](https://appshunter.io/developer/6787378793) |

## What reviewers say

### BootBrain

[App page](https://appshunter.io/ios/app/bootbrain/id6751806379)

**Features:** macOS Compatibility

**In-app purchases:** none


### ずんだチャイム

[App page](https://appshunter.io/ios/app/id6787574809)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is BootBrain free?

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

### Is ずんだチャイム free?

ずんだチャイム is free to download, with no in-app purchases.

### Do BootBrain or ずんだチャイム have ads?

Neither BootBrain nor ずんだチャイム shows ads.

### Which is updated more often, BootBrain or ずんだチャイム?

BootBrain ships an update every 8 days, and ずんだチャイム every 9 days. Most recently, BootBrain was updated on September 29, 2026 and ずんだチャイム on October 6, 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.*