# IDU (OS) vs Skillstone

The clearest difference is update cadence: IDU (OS) at monthly against Skillstone's every 3 months. 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.

IDU (OS) ships an update monthly, Skillstone every 3 months. The most recent releases landed on September 23, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | IDU (OS) | Skillstone |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 3 months |
| Monetization | Free | — |
| Size | 213 MB | 37 MB |
| Requires iOS | 16.4 | **15.5** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [IDU Identification](https://appshunter.io/developer/1500702804) | [Skillstone Pty Ltd](https://appshunter.io/developer/1707456327) |

## What reviewers say

### IDU (OS)

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

This app is a digital identity authenticator designed for businesses to efficiently manage clients. It can accurately scan and recognize over 1000 types of international identity documents, including passports and driver's licenses, streamlining entry processes.

**Highlights:** Digital ID authenticator, Client management solution, Scan 1000+ international ID documents, Supports passports, driver's licenses, proof of age cards, Efficient and accurate verification, Streamlines entry processes

**In-app purchases:** none


### Skillstone

[App page](https://appshunter.io/ios/app/skillstone/id6466529793)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is IDU (OS) free?

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

### Is Skillstone free?

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

### Do IDU (OS) or Skillstone have ads?

Neither IDU (OS) nor Skillstone shows ads.

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

IDU (OS) ships an update monthly, and Skillstone every 3 months. Most recently, IDU (OS) was updated on September 23, 2026 and Skillstone on September 29, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*