IDFA ATT vs IDFA Viewer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
IDFA ATT
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.
- 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
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With our app, you can easily access your iOS device IDFA and IP addresses (public and private IP addresses) KEY FEATURES: • Access iOS Device IDFA, Device ID and IP addresses • See your public (external) and private (internal) IP addresses • Stay informed about App Tracking Transparency (ATT) • Generate custom QR codes for your device IDFA and export • Share your IDFA and IP addresses • Quickly see your ATT consent status and navigate to “Privacy & Security” -> “Tracking” settings in order to change your permissions • Quickly add your device to “AdMob Test Devices” • Learn how to configure AdMob app-ads.txt and navigate to your relevant AdMob app-ads.txt configuration page • Learn how to implement ATT for your AdMob-enabled apps THE DEFINITION OF IDENTIFIER FOR ADVERTISERS (IDFA)? The identifier for advertisers (IDFA) is a random device identifier assigned by Apple to a user’s iOS device. Advertisers can use this device ID to track data so they can deliver customized advertising. The IDFA is used for tracking and identifying a user (without revealing personal information) and linking user actions and events to campaigns and channels. The data can then be used to attribute users to specific sources and gain a clear picture of how the types of users that different sources provide, thereby enabling precise campaign optimization and a data-driven user acquisition strategy. The IDFA can also identify when users interact with a mobile advertising campaign, provided the channel offers IDFA tracking and the advertiser tracks users who interact with ads successfully. If this occurs, the IDFA can identify whether specific users click an advert. WHY IS THE IDENTIFIER FOR ADVERTISER (IDFA) IMPORTANT? IDFAs are important because they are an accurate means to track iOS users. By assigning a device to a single IDFA, advertisers have crystal clear certainty about the defining qualities of that user and are able to accurately attribute them to the correct advertising campaign. The IDFA can be reset at any time by the user on each iOS device by going to security and privacy, selecting tracking, and toggling ‘Allow Apps to Request to Track’ off and then on (if they wish to have it on). Each time it is toggled off and on again, the IDFA is reset. While the IDFA’s depersonalization of user data offers a certain level of data protection, it still ultimately allows advertisers and marketers to leverage device specific data and perform targeted advertising as a result. IDFA FOLLOWING IOS 14.5 AND APP TRACKING TRANSPARENCY (ATT) The ability for advertisers to access the IDFA was drastically reduced with the rollout of iOS 14.5 in April 2021 and its corresponding App Tracking Transparency (ATT) framework. Once a device is running iOS 14.5 or later, advertisers and marketers are required to request permission to access the IDFA and track the user at this device ID level. If the user does not opt-in to allow tracking via the IDFA, the only way to perform attribution for campaigns run on iOS is via Apple’s SKAdNetwork (SKAN). WHAT IS APP TRACKING TRANSPARENCY (ATT)? App Tracking Transparency (ATT) is Apple’s user privacy framework. It requires apps on iOS to request user permission—via a pop-up prompt—to access the Identifier for Advertisers (IDFA) and track the user/the device. ATT was introduced with Apple’s iOS 14.5 update in April 2021 to address growing concerns about how much user data app developers could leverage to track and target users. Protecting user data and prioritizing privacy is top of mind for users. With this privacy-centric market in mind, maximizing ATT consent rates is a critical part of iOS strategies for app developers and marketers. The full-visibility insights that can be gained from opted-in data are also critical to informing strategic decisions regarding conversion value mapping and next-generation solutions like predictive analytics. In short, the higher your ATT opt-in rate, the better.
IDFA Viewer
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IDFA Viewer is the simplest way to find and copy your device’s Identifier for Advertisers (IDFA). Whether you’re a developer, marketer, or just curious about your device’s data, this app gives you fast and reliable access to your IDFA. Key Features: • Instantly view your iPhone’s IDFA • Copy the IDFA with a single tap • Clean and minimal design, no distractions Why IDFA Viewer? Apple’s Identifier for Advertisers (IDFA) is a unique identifier used in apps for analytics and advertising. Finding it manually can be confusing — IDFA Viewer makes it quick and effortless. Perfect for developers testing ad frameworks, marketers validating campaigns, or users who want transparency about their own device identifiers.
Screenshots
Verdict
The clearest difference is ads: IDFA Viewer at none against IDFA ATT's shown. IDFA ATT's advantage is iOS requirement (14.0 vs 18.0). On price, update cadence, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
IDFA ATT ships an update every 5 months, IDFA Viewer every 10 months. Both last shipped on September 14, 2026.
| Parameter | IDFA ATT | IDFA Viewer |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 months — better | Every 10 months |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 14.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 4 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Mehmet Bayram | Jesus Alfredo Hernandez Alarcon |
In-app purchases
IDFA ATT
No in-app purchases
IDFA Viewer
No in-app purchases








