# KeyPass Mobile ID vs Instrument Classification

The clearest difference is ads: KeyPass Mobile ID at none against Instrument Classification's shown. Instrument Classification's advantage is update cadence (every 2 weeks vs every 3 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

KeyPass Mobile ID ships an update every 3 months, Instrument Classification every 2 weeks. The most recent releases landed on October 11, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | KeyPass Mobile ID | Instrument Classification |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Size | 19 MB | 43 MB |
| Requires iOS | **15.6** | 15.8.3 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SHENZHEN KEYKING TECHNOLOGY CO.,LTD.](https://appshunter.io/developer/705079409) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### KeyPass Mobile ID

[App page](https://appshunter.io/ios/app/keypass-mobile-id/id6743077968)

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

**In-app purchases:** none


### Instrument Classification

[App page](https://appshunter.io/ios/app/instrument-classification/id6749178763)

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

**In-app purchases:** none


## Frequently asked questions

### Is KeyPass Mobile ID free?

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

### Is Instrument Classification free?

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

### Do KeyPass Mobile ID or Instrument Classification have ads?

Instrument Classification shows ads; KeyPass Mobile ID does not.

### Which is updated more often, KeyPass Mobile ID or Instrument Classification?

KeyPass Mobile ID ships an update every 3 months, and Instrument Classification every 2 weeks. Most recently, KeyPass Mobile ID was updated on October 11, 2026 and Instrument Classification on September 24, 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.*