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StateMaps
Data type · 57% of apps

Apps that collect Identifiers

An account ID, screen name, customer number or a device-level ID such as the advertising identifier. Identifiers let a service recognise the same person or phone across sessions. Combined with other data, they are what makes cross-app tracking possible.

Includes
  • User ID
  • Device ID
Where to limit it on iPhone

Settings › Privacy & Security › Tracking: turn off Allow Apps to Request to Track, or tap Ask App Not to Track when prompted.

Used to track you
1,111
Linked to you
1,450
Not linked to you
1,146

By category

Identifiers — used to track you (1,111)

Apple defines tracking as linking data from this app with data from other companies' apps, websites or offline sources for targeted advertising or ad measurement, or sharing it with a data broker. Showing the first 90; browse a category for the rest.

Identifiers — linked to you (1,450)

Collected and tied to your identity, for example through your account, your device or other details that identify you. Showing the first 90; browse a category for the rest.

Identifiers — not linked to you (1,146)

Collected, but the developer says it is de-identified or anonymised and not tied back to you. Showing the first 90; browse a category for the rest.

FAQ

What counts as Identifiers on a privacy label?
An account ID, screen name, customer number or a device-level ID such as the advertising identifier. Apple's sub-types are: User ID, Device ID.
How many iPhone apps collect Identifiers?
2,433 of the 4,289 apps with a label in our snapshot (57%). 1,111 of them use it to track you.
How do I limit Identifiers on iPhone?
Settings › Privacy & Security › Tracking: turn off Allow Apps to Request to Track, or tap Ask App Not to Track when prompted.
Why does Identifiers matter?
Identifiers let a service recognise the same person or phone across sessions. Combined with other data, they are what makes cross-app tracking possible.

Other data types: Usage Data · Diagnostics · Contact Info · User Content · Location · Purchases · Financial Info · Contacts · Other Data · Health & Fitness · Search History · Sensitive Info · Browsing History · Surroundings · Body

Facts on this page come from Apple App Store privacy labels, as reported by the developer. Checked November 2026. How we collect data · Report a correction