# MOD4 vs AGB O.Key

The clearest difference is iOS requirement: MOD4 at 11.0 against AGB O.Key's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

MOD4 ships an update every 4 months, AGB O.Key every 2 months. The most recent releases landed on May 17, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | MOD4 | AGB O.Key |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Size | 46 MB | 91 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [IMG Sicurezza Italia S.R.L.S.](https://appshunter.io/developer/1495771178) | [Alban Giacomo SpA](https://appshunter.io/developer/1503359832) |

## What reviewers say

### MOD4

[App page](https://appshunter.io/ios/app/mod4/id6443628227)

**Features:** macOS Compatibility

**In-app purchases:** none


### AGB O.Key

[App page](https://appshunter.io/ios/app/agb-okey/id6443794054)

**In-app purchases:** none


## Frequently asked questions

### Is MOD4 free?

MOD4 is free to download, with no in-app purchases.

### Is AGB O.Key free?

AGB O.Key is free to download, with no in-app purchases.

### Do MOD4 or AGB O.Key have ads?

Neither MOD4 nor AGB O.Key shows ads.

### Which is updated more often, MOD4 or AGB O.Key?

MOD4 ships an update every 4 months, and AGB O.Key every 2 months. Most recently, MOD4 was updated on May 17, 2026 and AGB O.Key on September 8, 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.*