# 4 vs SipSync app

The clearest difference is iOS requirement: SipSync app at 15.1 against 4's 17.0. 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.

## The numbers

| Metric | 4 | SipSync app |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | — |
| Size | 3 MB | 46 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Shenzhen Jiufen Information Technology Co., Ltd.](https://appshunter.io/developer/1656332286) | [WEBDEV BV](https://appshunter.io/developer/1879571391) |

## What reviewers say

### 4

[App page](https://appshunter.io/ios/app/4-7-8-breathe/id6758927414)

**Features:** macOS Compatibility

**In-app purchases:** none


### SipSync app

[App page](https://appshunter.io/ios/app/sipsync-app/id6759573022)

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

**In-app purchases:** none


## Frequently asked questions

### Is 4 free?

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

### Is SipSync app free?

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

### Do 4 or SipSync app have ads?

Neither 4 nor SipSync app 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.*