“Allow ‘The Sims’ to track your activity?” “Allow ‘Merriam-Webster’ to track your activity?” “Allow ‘WSJ’ to track your activity?”

Welcome to the start of iPhone and iPad privacy pop-upalooza. Expect a whole lot more of it in the coming weeks. In Apple’s AAPL 0.71% next software release, iOS 14.5, apps that track user data for advertising purposes or share data with data brokers will be required to show you a prompt asking permission to track. Some developers have already implemented the prompt, which is why you may be seeing the pop-ups right now.

On these pop-ups, you’ll have two options to choose from: “Allow” or “Ask App Not to Track.” The idea is that instead of digging through complicated settings to opt out of tracking that you don’t really see or are even aware of, you can now opt in, if you enjoy targeted ads. Apps will now ask you before sharing your data with other apps—or third-party advertisers or data brokers. It’s all part of Apple’s effort to present you with more privacy controls.

But while the choices might seem simple, there’s quite a lot happening behind the scenes. What exactly do these options mean, and how will they impact your privacy? Here’s a breakdown of what Apple is calling App Tracking Transparency, and what happens if you opt out or opt in.

Wait, apps are tracking me?

Oh, yes, apps have been tracking you. You know how you may search for something on one website and then the ad for that product can follow you around the web? Well, instead of using web-browser tracking tools like cookies, iPhone apps tend to use a secret string of numbers on your phone. It’s called the IDFA—Identifier for Advertisers—and is used for tracking and identifying what you do in apps and across apps. (Android has something similar.)

Here’s an example of how it works. You download a free, ad-supported meal-tracking app. Then a few hours later you start seeing ads for weight loss or healthy eating in your Facebook feed. You also start seeing ads based on what Facebook knows about you (maybe your interest in technology or comfy clothing) right in the food-tracking app.

What’s happened behind the scenes? The food-tracking app and Facebook matched information about you using your IDFA.

Since most apps use this ID, the data attached to your IDFA can include everything from what apps you’ve downloaded and what you’ve searched for to your purchase history and location—and much, much more.

Apple’s Privacy Feature Could Limit User Tracking

With Apple’s latest version of iOS, users will be able to decide whether individual apps can track them. The change has the potential to cause major disruptions to the digital advertising industry.

How apps and advertisers will be allowed access to Apple users’ data

Apple devices have a unique advertising identifier—a string of numbers that provide insights into Apple users’ online habits, made visible to developers and third parties. If a user agrees to allow tracking, third parties can use user’s data to offer personalized ads.

Allow ‘Social’ to track your activity across other companies’ apps and

websites?

This identifier will be

used to deliver a personalized experience to you.

A user downloads three apps named Adoption, Shopping and Social. Upon opening each app, a pop-up message appears—the user chooses ‘Allow Tracking’.

Ask App Not to Track

ADOPTION APP

SHOPPING APP

SOCIAL APP

The user searches

for available puppies on the Adoption app…

…then buys household items, including a pet crate and dog treats…

…then watches puppy videos and joins the ‘waggingdogs’ group on the Social app.

DATA COLLECTED

Device’s advertising identifier, or other device-level IDs

Contact info

Contact info

Purchase history

Location of device

App search history

The Adoption and Shopping apps send information like a person’s name, email address and phone number to a data broker.

App usage data

The data broker sells the data that it has collected about the user and devices to the Social app.

The Social app links data from the data broker with existing account data on its servers. The app then serves a personalized ad for ‘BK’s Finest’ puppy classes.

BK’s Finest Dog Daycare and Boarding

Brooklyn, New York

Slots are available for our May 2021 puppy classes (4-6 months)! Focuses on socialization and familiarizing your puppy with basic behaviors and cues.

Apple devices have a unique advertising identifier—a string of numbers that provide insights into Apple users’ online habits, made visible to developers and third parties. If a user agrees to allow tracking, third parties can use user’s data to offer personalized ads.

Allow ‘Social’ to track your activity across other companies’ apps and

websites?

This identifier will be

used to deliver a personalized experience to you.

A user downloads three apps named Adoption, Shopping and Social. Upon opening each app, a pop-up message appears—the user chooses ‘Allow Tracking’.

Ask App Not to Track

ADOPTION APP

SHOPPING APP

SOCIAL APP

The user searches

for available puppies on the Adoption app…

…then buys household items, including a pet crate and dog treats…

…then watches puppy videos and joins the ‘waggingdogs’ group on the Social app.

DATA COLLECTED

Device’s advertising identifier, or other device-level IDs

Contact info

Contact info

Purchase history

Location of device

App search history

The Adoption and Shopping apps send information like a person’s name, email address and phone number to a data broker.

App usage data

The data broker sells the data that it has collected about the user and devices to the Social app.

The Social app links data from the data broker with existing account data on its servers. The app then serves a personalized ad for ‘BK’s Finest’ puppy classes.

BK’s Finest Dog Daycare and Boarding

Brooklyn, New York

Slots are available for our May 2021 puppy classes (4-6 months)! Focuses on socialization and familiarizing your puppy with basic behaviors and cues.

Apple devices have a unique advertising identifier—a string of numbers that provide insights into Apple users’ online habits, made visible to developers and third parties. If a user agrees to allow tracking, third parties can use user’s data to offer personalized ads.

Allow ‘Social’ to track your activity across other companies’ apps and

websites?

This identifier will be

used to deliver a personalized experience to you.

Ask App Not to Track

A user downloads three apps named Adoption, Shopping and Social. Upon opening each app, a pop-up message appears—the user chooses ‘Allow Tracking’.

ADOPTION APP

SHOPPING APP

SOCIAL APP

The user searches

for available puppies on the Adoption app…

…then buys household items, including a pet crate and dog treats…

…then watches puppy videos and joins the ‘waggingdogs’ group on the Social app.

DATA COLLECTED

Device’s advertising identifier, or other device-level IDs

Contact info

Contact info

Purchase history

Location of device

App search history

The Adoption and Shopping apps send information like a person’s name, email address and phone number to a data broker.

App usage data

The data broker sells the data that it has collected about the user and devices to the Social app.

The Social app links data from the data broker with existing account data on its servers. The app then serves a personalized ad for ‘BK’s Finest’ puppy classes.

BK’s Finest Dog Daycare and Boarding

Brooklyn, New York

Slots are available for our May 2021 puppy classes (4-6 months)! Focuses on socialization and familiarizing your puppy with basic behaviors and cues.

Apple devices have a unique advertising identifier—a string of numbers that provide insights into Apple users’ online habits, made visible to developers and third parties. If a user agrees to allow tracking, third parties can use user’s data to offer personalized ads.

Allow ‘Social’ to track your activity across other companies’ apps and

websites?

This identifier will be

used to deliver a personalized experience to you.

Ask App Not to Track

A user downloads three apps named Adoption, Shopping and Social. Upon opening each app, a pop-up message appears—the user chooses ‘Allow Tracking’.

ADOPTION APP

The user searches for available puppies on the Adoption app…

SHOPPING APP

…then buys household items, including a pet crate and dog treats…

SOCIAL APP

…then watches puppy videos and joins the ‘waggingdogs’ group on the Social app.

The Adoption and Shopping apps send information like a person’s name, email address and phone number to a data broker.

Device’s advertising identifier, or other device-level IDs

Contact info

Purchase history

The data broker sells the data that it has collected about the user and devices to the Social app.

The Social app links data from the data broker with existing account data on its servers. The app then serves a personalized ad for ‘BK’s Finest’ puppy classes.

Contact info

Location of device

App search history

App usage data

BK’s Finest Dog Daycare and Boarding

Brooklyn, New York

Slots are available for our May 2021 puppy classes (4-6 months)! Focuses on socialization and familiarizing your puppy with basic behaviors and cues.

Why am I seeing these pop-ups?

Unless you’ve been a religious reader of our columns or are pretty tapped into this stuff, you have probably not been aware of the extent of all this tracking. So Apple decided it was time to make it less opaque. In iOS 14.5, apps can only gain your IDFA if they ask permission, and you grant it.

Many companies are now releasing compatible apps ahead of Apple’s public release of iOS 14.5. This is why, for example, you may have started to see this appear in our very own Wall Street Journal iOS app.

In the pop-up, app developers can say why they want to track users. The Sims app’s wordy explanation argues that ads would be less relevant and third-party logins wouldn’t work without tracking.

Photo: Joanna Stern/The Wall Street Journal

Why is Apple doing this?

Apple has long billed itself as a company with a commitment to user privacy. In 2017 the company made it harder for websites to use cookies to track people in the Safari browser on iOS and Mac devices.

But that ethos goes further back than that. It was a strong belief of Steve Jobs. “Privacy means people know what they are signing up for in plain English,” the late Apple co-founder said in 2010 at an All Things Digital conference. “I believe some people want to share more data than other people do. Ask them.”

Apple CEO Tim Cook has continued that commitment and condemned how app-tracking tools are turning consumers into ad magnets. Let’s also not forget that Apple—unlike Facebook or Google—doesn’t depend on ad revenue but the sale of hardware and services to consumers. Facebook has vocally opposed Apple’s move, explaining that businesses rely on this personalized advertising.

What happens when I tap “Ask App Not to Track”?

When you tap this option, you’re opting out of tracking, and the app is prevented from accessing your IDFA.

Beyond that number, this prompt is a signal to apps that you don’t want to be tracked in any other way, including personal information like email addresses and phone numbers. According to Apple, “App developers are responsible for ensuring they comply with your choices.”

If you want to stop tracking across all apps, and prevent future pop-ups, go to your device’s Privacy settings and disable ‘Allow Apps to Request to Track.’

Photo: Joanna Stern/The Wall Street Journal

What happens when I tap “Allow”?

When you tap this option, it’s business as usual. You are opting into personalized, targeted advertising. You are allowing the app to collect information about you and share it with other apps or parties, including data brokers.

Apps get a chance to explain, in smaller text beneath the main prompt, what data they need and why they need it. A few apps will go even further, possibly with a full pop-up of their own explaining how advertising supports their businesses and how your information is used or shared.

When you are presented with the pop-up, you can’t swipe away or even swipe back to your home screen. You must make a choice. But you can always change your permissions settings after the fact as well as see all of the apps that have prompted you. Go to Settings > Privacy > Tracking.

What if I don’t want any pop-ups? Can I opt out from all app tracking?

There is a universal setting that will make your default answer to developers “no.” Under Tracking, you’ll see “Allow Apps to Request to Track.” If you have it turned on, the apps will continue to prompt you. If you have it turned off, the apps won’t ask, and they won’t have access to your identifier.

In other words, keep this setting off if you don’t want to be bugged about tracking.

SHARE YOUR THOUGHTS

Do you think there’s a case for targeted ads? In what instances would you agree to tracking? Join the conversation below.

Here’s where it gets a little confusing: You may not be seeing any pop-ups at all. One reason for that may be because “Allow Apps to Request to Track” has replaced a previous setting, called “Limit Ad Tracking,” which you may have turned on. If you did, your “Allow Apps” switch is now off. Don’t touch it! You’re all set.

—For more WSJ Technology analysis, reviews, advice and headlines, sign up for our weekly newsletter.

Write to Joanna Stern at [email protected] and Nicole Nguyen at [email protected]

Copyright ©2020 Dow Jones & Company, Inc. All Rights Reserved. 87990cbe856818d5eddac44c7b1cdeb8

This post first appeared on wsj.com

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