# IDFA vs IDFA Viewer

The clearest difference is ads: IDFA Viewer at none against IDFA's shown. IDFA Viewer also leads on iOS requirement (15.6 vs 18). IDFA's advantage is update cadence (every 3 days vs every 9 months). On price, 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.

IDFA ships an update every 3 days, IDFA Viewer every 9 months. The most recent releases landed on September 30, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | IDFA | IDFA Viewer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Every 9 months |
| Size | 9 MB | 5 MB |
| Requires iOS | 18 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Paul Thornton](https://appshunter.io/developer/1203471660) | [翠芬 梁](https://appshunter.io/developer/1792659056) |

## What reviewers say

### IDFA

[App page](https://appshunter.io/ios/app/idfa/id6746059639)

**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 IDFA free?

IDFA 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 IDFA or IDFA Viewer have ads?

IDFA shows ads; IDFA Viewer does not.

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

IDFA ships an update every 3 days, and IDFA Viewer every 9 months. Most recently, IDFA was updated on September 30, 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.*