# 300B Upgrade vs Blitzrock

300B Upgrade and Blitzrock are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

## The numbers

| Metric | 300B Upgrade | Blitzrock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 6 days |
| Size | 3 MB | 36 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [福财 黄](https://appshunter.io/developer/1269516511) | [TONG DE LIMITED](https://appshunter.io/developer/1491108286) |

## What reviewers say

### 300B Upgrade

[App page](https://appshunter.io/ios/app/300b-upgrade/id6477339895)

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

**In-app purchases:** none


### Blitzrock

[App page](https://appshunter.io/ios/app/blitzrock/id6480093189)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 300B Upgrade free?

300B Upgrade is free to download, with no in-app purchases.

### Is Blitzrock free?

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

### Do 300B Upgrade or Blitzrock have ads?

Neither 300B Upgrade nor Blitzrock shows ads.

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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.*