❤ iOS 13.5 released: Faster unlock with face masks plus COVID-19 contact tracing



After releasing the golden master to developers earlier this week, Apple is releasing iOS 13.5 to the general public today. The update brings quite a few changes and new features prompted by COVID-19, including the Exposure Notification API, Face ID enhancements, and much more.

Apple and Google have been developing the Exposure Notification API with close guidance from public health officials. When a user enables the feature and has an app from a public health authority installed, the device will regularly send out a beacon via Bluetooth that includes a random Bluetooth identifier. From there, the Exposure Notification API will download a list of the keys for the beacons that have been verified as belonging to people confirmed as positive for COVID-19 and check against that list. If there is a match, the user may be notified and advised on next steps.

Apple and Google say that as of today, a handful of U.S. states and 22 countries across five continents have requested and received access to the Exposure Notification API. The two companies say they have consulted with and briefed a number of different public health teams, including the Centers for Disease Control and Prevention, the CDC Foundation, the Association of Public Health Laboratories, the Association of State and Territorial Health Officials, the Council of State and Territorial Epidemiologists, and the Public Health Informatics Institute of the Taskforce for Global Health.






The release of iOS 13.5 today means that public health agencies around the world can begin deploying their applications that take advantage of Apple and Google Exposure Notification API.

Key changes made to the Exposure Notification API based on feedback from public health agencies include:

  • Public health agencies can define what constitutes an exposure event
  • Public health agencies can determine the number of exposure events a person has had
  • Transmission risk of positive cases can be factored into the definition of an exposure event
  • Public health agencies can contact exposed users based on a combination fo the API and data that users voluntarily choose to input into the app

Apple and Google also say that they have made further privacy enhancements to the Exposure Notification API:

  • Temporary Exposure Keys are now generated randomly instead of being derived from a tracing key
  • All metadata associated with Bluetooth is now encrypted to make it more difficult to identify a person





Apple and Google elaborated on the need for this Exposure Notification API in helping slow the spread of COVID-19. The goal, the companies say, is to offer rapid notifications to exposed users. Again, Apple and Google both emphasize that what they’ve built is not an app, but rather an API that public health agencies can incorporate into their own apps.

One of the most effective techniques that public health officials have used during outbreaks is called contact tracing. Through this approach, public health officials contact, test, treat and advise people who may have been exposed to an affected person. One new element of contact tracing is Exposure Notifications: using privacy-preserving digital technology to tell someone they may have been exposed to the virus. Exposure Notification has the specific goal of rapid notification, which is especially important to slowing the spread of the disease with a virus that can be spread asymptomatically.

To help, Apple and Google cooperated to build Exposure Notifications technology that will enable apps created by public health agencies to work more accurately, reliably and effectively across both Android phones and iPhones. Over the last several weeks, our two companies have worked together, reaching out to public health officials scientists, privacy groups and government leaders all over the world to get their input and guidance.

Starting today, our Exposure Notifications technology is available to public health agencies on both iOS and Android. What we’ve built is not an app — rather public health agencies will incorporate the API into their own apps that people install. Our technology is designed to make these apps work better. Each user gets to decide whether or not to opt-in to Exposure Notifications; the system does not collect or use location from the device; and if a person is diagnosed with COVID-19, it is up to them whether or not to report that in the public health app. User adoption is key to success and we believe that these strong privacy protections are also the best way to encourage use of these apps.

Today, this technology is in the hands of public health agencies across the world who will take the lead and we will continue to support their efforts.

Among the first states to commit to adopting the Apple and Google Exposure Notification API are North Dakota, South Carolina, and Alabama. Leslie A. Lenert MD, Assistant Provost for Data Science and Informatics and Chief Research Information Officer, Medical University of South Carolina, said:

“The Department of Health and Environment Concerns (DHEC) and the Medical University of South Carolina (MUSC) are building the SC-Safer-Together COVID-19 risk management app, which is designed to let people know anonymously that they may have been exposed to the virus and giving them the option to connect with public health officials. Built to tough medical privacy protection standards by health care providers, the SC Safer Together app, using the Apple-Google system, protects users’ privacy and will help South Carolina safely get back to work. MUSC is also proud to be working with Clemson University and the University of California San Diego on smart and private extensions that will further enhance the app’s capabilities.”





Dr. Scott Harris, Alabama State Health Officer, said the state is working to accelerate the development of an exposure notification system:

“The State of Alabama’s priority as we fight the COVID-19 pandemic together is the health and safety of its citizens as well as their privacy. In partnership with Apple and Google, the Alabama Department of Public Health, University of Alabama System, and the University of Alabama at Birmingham, we are harnessing technology to accelerate exposure notification to slow the spread of COVID-19 so that we can all be safe together.”

The CDC:

This technology may help identify people that could have been exposed to SARS-CoV-2. Public health partners are exploring how this may be used to support COVID-19 pandemic response efforts.

And finally, North Dakota Governor Doug Burgum:

“North Dakota is excited to be among the first states in the nation to utilize the exposure notification technology built by Apple and Google to help keep our citizens safe. The CARE19 Exposure app will help us improve contact tracing and continue our ND Smart Restart by notifying people who may have been exposed to COVID-19, reaching the greatest number of people in a way that protects their privacy. As we respond to this unprecedented public health emergency, we invite other states to join us in leveraging smartphone technologies to strengthen existing contact tracing efforts, which are critical to getting communities and economies back up and running.”

Apple and Google are continuing to publish resources for privacy-preserving contact tracing. You can find the details, with revision history, here. The sample code is available on Apple’s developer website.

In addition to the first version of the Exposure Notification API, iOS 13.5 also includes a few other changes. With the update, your iPhone or iPad will now skip Face ID authentication and skip directly to the passcode screen if it detects you are wearing a mask. You can also now disable the automatic face zooming feature in a Group FaceTime call.

  • iOS 13.5 beta makes it easier to skip Face ID if you’re wearing a mask
  • Apple releases iOS 13.5 beta with first version of its COVID-19 exposure notification API
  • Busy Group FaceTime call? iOS 13.5 lets you turn off automatic face zooming

In the release notes, Apple says the update also makes bug fixes for streaming video, the Mail app on iPad, and the share sheet. Here are the full release notes for the update:

iOS 13.5 release notes:

iOS 13.5 speeds up access to the passcode field on devices with Face ID when you are wearing a face mask and introduces the Exposure Notification API to support COVID-19 contact tracing apps from public health authorities. This update also introduces an option to control automatic prominence of video tiles on Group FaceTime calls and includes bug fixes and other improvements.

Face ID and Passcode

  • Simplified unlock process for devices with Face ID when you are wearing a face mask
  • Passcode field automatically presented after swiping up from the bottom of the Lock screen when you are wearing a face mask
  • Also works when authenticating with the App Store, Apple Books, Apple Pay, iTunes, and other apps that support signing in with Face ID

Exposure Notification

  • Exposure Notification API to support COVID-19 contact tracing apps from public health authorities


  • Option to control automatic prominence on Group FaceTime calls so video tiles do not change size when a participant speaks

Emergency Services

  • Option to automatically share health and other essential information from your Medical ID with emergency services when you place an emergency call (US only)

This update also includes bug fixes and other improvements.

  • Fixes an issue where users may see a black screen when trying to play streaming video from some websites
  • Addresses an issue in the share sheet where suggestions and actions may not load

You can update to iOS 13.5 and iPadOS 13.5 on your iPhone or iPad by heading to the Settings app, then choose General, then Software Update. The update should start rolling out very soon if you don’t yet see it on your device.