# Carlsbro vs A4

The clearest difference is update cadence: A4 at every 5 days against Carlsbro's every 2 weeks. A4 also leads on iOS requirement (9.0 vs 15). On price, ads, 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.

Carlsbro ships an update every 2 weeks, A4 every 5 days. The most recent releases landed on October 28, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Carlsbro | A4 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 5 days** |
| Size | 95 MB | 101 MB |
| Requires iOS | 15 | **9.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Soundking Group Co.,Ltd](https://appshunter.io/developer/1131173418) | [GUANDDONG TIANPU TECHNOLOGY GROUP CO.,LTD.](https://appshunter.io/developer/1637560013) |

## What reviewers say

### Carlsbro

[App page](https://appshunter.io/ios/app/carlsbro/id6756413875)

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

**In-app purchases:** none


### A4

[App page](https://appshunter.io/ios/app/a4-k/id6760325017)

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

**In-app purchases:** none


## Frequently asked questions

### Is Carlsbro free?

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

### Is A4 free?

A4 is free to download, with no in-app purchases.

### Do Carlsbro or A4 have ads?

Neither Carlsbro nor A4 shows ads.

### Which is updated more often, Carlsbro or A4?

Carlsbro ships an update every 2 weeks, and A4 every 5 days. Most recently, Carlsbro was updated on October 28, 2026 and A4 on October 14, 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.*