# Qassay vs IDFA Viewer

The clearest difference is update cadence: Qassay at every 3 weeks against IDFA Viewer's every 9 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.

Qassay ships an update every 3 weeks, IDFA Viewer every 9 months. The most recent releases landed on October 9, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Qassay | IDFA Viewer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 9 months |
| Size | 49 MB | 5 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [P4Q Health S.L.](https://appshunter.io/developer/1668093762) | [翠芬 梁](https://appshunter.io/developer/1792659056) |

## What reviewers say

### Qassay

[App page](https://appshunter.io/ios/app/qassay/id1668093760)

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

**In-app purchases:** none


### IDFA Viewer

[App page](https://appshunter.io/ios/app/idfa-viewer-device-info-viewer/id6748586602)

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

**In-app purchases:** none


## Frequently asked questions

### Is Qassay free?

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

### Is IDFA Viewer free?

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

### Do Qassay or IDFA Viewer have ads?

Neither Qassay nor IDFA Viewer shows ads.

### Which is updated more often, Qassay or IDFA Viewer?

Qassay ships an update every 3 weeks, and IDFA Viewer every 9 months. Most recently, Qassay was updated on October 9, 2026 and IDFA Viewer on October 12, 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.*