# Zefix mobile vs Boum

The clearest difference is update cadence: Boum at every 3 weeks against Zefix mobile's every 9 months. Zefix mobile's advantage is iOS requirement (13.0 vs 15.0). 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.

Zefix mobile ships an update every 9 months, Boum every 3 weeks. The most recent releases landed on October 7, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Zefix mobile | Boum |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 3 weeks** |
| Size | 17 MB | 87 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Eidgenössisches Polizei- und Justizdepartement EJPD](https://appshunter.io/developer/1385066713) | [Boum AG](https://appshunter.io/developer/1622571833) |

## What reviewers say

### Zefix mobile

[App page](https://appshunter.io/ios/app/zefix-mobile/id1385066714)

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

**In-app purchases:** none


### Boum

[App page](https://appshunter.io/ios/app/boum/id1622571831)

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

**In-app purchases:** none


## Frequently asked questions

### Is Zefix mobile free?

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

### Is Boum free?

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

### Do Zefix mobile or Boum have ads?

Neither Zefix mobile nor Boum shows ads.

### Which is updated more often, Zefix mobile or Boum?

Zefix mobile ships an update every 9 months, and Boum every 3 weeks. Most recently, Zefix mobile was updated on October 7, 2026 and Boum 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.*