# Postos Bambu vs Iris Security 4

The clearest difference is update cadence: Iris Security 4 at fortnightly against Postos Bambu's every 7 months. Postos Bambu's advantage is iOS requirement (13.0 vs 15.6). 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.

Postos Bambu ships an update every 7 months, Iris Security 4 fortnightly. The most recent releases landed on September 17, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Postos Bambu | Iris Security 4 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Fortnightly** |
| Size | 67 MB | 102 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [POSTOAKI DESENVOLVIMENTO TECNOLOGICO LTDA](https://appshunter.io/developer/1186130596) | [IRIS BS SYSTEM EIRELI](https://appshunter.io/developer/927664874) |

## What reviewers say

### Postos Bambu

[App page](https://appshunter.io/ios/app/postos-bambu/id1566642994)

**Features:** macOS Compatibility

**In-app purchases:** none


### Iris Security 4

[App page](https://appshunter.io/ios/app/iris-security-4/id6476619410)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Postos Bambu free?

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

### Is Iris Security 4 free?

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

### Do Postos Bambu or Iris Security 4 have ads?

Neither Postos Bambu nor Iris Security 4 shows ads.

### Which is updated more often, Postos Bambu or Iris Security 4?

Postos Bambu ships an update every 7 months, and Iris Security 4 fortnightly. Most recently, Postos Bambu was updated on September 17, 2026 and Iris Security 4 on September 15, 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.*