# Yellowfin Mobile vs IDU (OS)

The clearest difference is update cadence: IDU (OS) at monthly against Yellowfin Mobile's every 4 months. Yellowfin Mobile's advantage is iOS requirement (11.0 vs 16.4). 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.

Yellowfin Mobile ships an update every 4 months, IDU (OS) monthly. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Yellowfin Mobile | IDU (OS) |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Monthly** |
| Monetization | — | Free |
| Size | 153 MB | 224 MB |
| Requires iOS | **11.0** | 16.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yellowfin](https://appshunter.io/developer/329809514) | [IDU Identification](https://appshunter.io/developer/1500702804) |

## What reviewers say

### Yellowfin Mobile

[App page](https://appshunter.io/ios/app/yellowfin-mobile/id1474932493)

**Features:** macOS Compatibility

**In-app purchases:** none


### IDU (OS)

[App page](https://appshunter.io/ios/app/idu-os/id1558378587)

This app provides a secure and efficient way for businesses to manage clients and verify identities. It can scan over 1000 international identity documents, including passports and driver's licenses, in seconds.

**Highlights:** Digital ID authenticator, Client management, Scan 1000+ international IDs, Passport verification, Driver's license scanning, Proof of age card scanning

**In-app purchases:** none


## Frequently asked questions

### Is Yellowfin Mobile free?

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

### Is IDU (OS) free?

IDU (OS) is free to download, with no in-app purchases.

### Do Yellowfin Mobile or IDU (OS) have ads?

Neither Yellowfin Mobile nor IDU (OS) shows ads.

### Which is updated more often, Yellowfin Mobile or IDU (OS)?

Yellowfin Mobile ships an update every 4 months, and IDU (OS) monthly. Most recently, Yellowfin Mobile was updated on November 3, 2026 and IDU (OS) on November 7, 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.*