# auth. vs IDFA ATT

The clearest difference is price: IDFA ATT at Free against auth.'s $3.99. IDFA ATT also leads on iOS requirement (14.0 vs 16.0). auth.'s advantage is ads (none vs shown) and update cadence (monthly vs every 5 months). On in-app purchases there is nothing between them.

IDFA ATT is free to download; auth. costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

auth. ships an update monthly, IDFA ATT every 5 months. Both last shipped on October 1, 2026.

## The numbers

| Metric | auth. | IDFA ATT |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[4.7 (6 ratings)](https://appshunter.io/ios/app/auth-2fa-smart-sync/id1553284993/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 58.3% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 5 months |
| Monetization | Paid | **Ad-supported** |
| Best chart rank | **#181** | — |
| Size | 38 MB | 4 MB |
| Requires iOS | 16.0 | **14.0** |
| Devices | **iPhone, iPad, Mac, Apple Watch, Vision Pro** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ChakMing Wong](https://appshunter.io/developer/1525986104) | [Mehmet Bayram](https://appshunter.io/developer/1541281376) |

## What reviewers say

### auth.

[App page](https://appshunter.io/ios/app/auth-2fa-smart-sync/id1553284993)

**Currently charting:** #181 Top Paid · Developer Tools (US App Store)

This app securely stores and manages your two-factor authentication codes in one place. It simplifies the process by allowing QR code scanning or link-based setup, ensuring your accounts remain protected.

**Highlights:** Unlimited account storage, QR code scanning, Link-based account addition, Offline running, Customizable timeout and auto-lock, Password and safe code storage

**Features:** Apple Watch app

**In-app purchases:** none


### IDFA ATT

[App page](https://appshunter.io/ios/app/idfa-att/id6451246283)

Easily access your iOS device's IDFA and IP addresses. Stay informed about App Tracking Transparency (ATT) and generate custom QR codes for your device IDFA. Quickly check your ATT consent status and navigate to tracking settings.

**Highlights:** Access iOS Device IDFA and IP addresses, View public and private IP addresses, Understand App Tracking Transparency (ATT), Generate and export custom QR codes for IDFA, Check ATT consent status, Add device to AdMob Test Devices, Learn AdMob app-ads.txt configuration

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

**In-app purchases:** none


## Frequently asked questions

### Is auth. free?

auth. costs $3.99, with no in-app purchases.

### Is IDFA ATT free?

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

### Do auth. or IDFA ATT have ads?

IDFA ATT shows ads; auth. does not.

### Which is updated more often, auth. or IDFA ATT?

auth. ships an update monthly, and IDFA ATT every 5 months. Most recently, auth. was updated on October 1, 2026 and IDFA ATT on October 1, 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.*