Exposure Notification
The privacy-preserving COVID-19 exposure notification system, now retired.
Introduced
2020
iOS 13.5
Kind
Framework
Runs on
iPhone
No longer available
Get it from
iOS
iPadOS
Mac Catalyst
macOS
tvOS
visionOS
watchOS
Overview
Apple and Google built Exposure Notification so public health authorities could alert people who had been near someone who tested positive for COVID-19, using Bluetooth and rotating identifiers instead of location.
The system was turned off on September 18, 2023. Its documentation and specifications remain online as a reference for privacy-preserving design.
Privacy-preserving
Bluetooth and rotating keys, no location.
Public health apps
Built only for health authorities.
Express
Notifications without a separate app.
Retired
Turned off on September 18, 2023.
History
How it grew up.
2020
Introduced
Apple and Google launch it in iOS 13.5.
2020
Express
Health authorities can use it without building an app.
2023
Retired
No longer available from September 18.
Watch and learn
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