MD COVID Alert is the official COVID-19 exposure-notifications software for the Maryland Department of Health. The app is an instance of Exposure Notifications Express platform developed by Apple and Google and configured by Maryland.

Your personal use of MD COVID Alert will help anonymously alert Maryland residents who may have been near someone with a positive COVID-19 diagnosis. When you enable MD COVID Alert, you are doing your part to efficiently and effectively help your community slow the spread of COVID-19.

How MD COVID Alert works:
When devices with MD COVID Alert are in close contact, they exchange random identifiers using Bluetooth Low Energy (BLE). When someone tells their app that they tested positive for COVID-19, whoever received their random identifiers may receive an alert that they may have possibly been exposed to COVID-19. When a device receives random identifiers it date-stamps them and records their signal strength so that the Exposure Notification system can estimate how close the two devices were to each other and for how long. If the timeframe was at least 15 minutes and the estimated distance was within six feet, then the other user receives a notification of a possible exposure.

Apple and Google's Exposure Notifications framework runs in the background, even when the MD COVID Alert app is closed. It will not drain the device battery at a rate that would occur with other apps that use normal Bluetooth and/or are open and running constantly.

How MD COVID Alert Protects Your Privacy:
Maryland takes your privacy and confidentiality very seriously. Apple and Google's framework is designed to avoid correlating any personal data and location information with the random identifiers that devices exchange. Maryland Department of Health does not want or need to know where or who you are for MD COVID Alert to work. If you are close enough to another app user, your device's BLE will exchange random identifiers with that user.

Laboratory results for all persons who test positive for COVID-19 are sent to Maryland Department of Health. This is not associated with the app. Our staff follows up with persons reported as positive, based on information provided within the laboratory report. As a courtesy to all app users, MD COVID ALert will verify positive tests and then provide MD COVID Alert users with a personal identifying number (PIN). You must use that PIN in order to report a positive result to the app. This prevents people from falsely reporting positive results, which could generate false exposure notifications. Maryland Department of Health wants all app users to feel confident that when a possible COVID-19 exposure is received via the app, that it is a real event.

If you have the current Apple or Google operating system installed on your device, you may have noticed that Exposure Notifications are now included. You cannot enable this function until you have installed the MD COVID Alert app. Apple and Google will delete the exposure notification service tools from their respective operating systems once the pandemic reaches a point that public health no longer requires the use of this technology.

Thank you for installing MD COVID Alert! Together, we can protect our family, friends, neighbors, and colleagues, and keep Maryland moving forward!

From version MD COVID Alert minted1400023:

Bug fixes and performance improvements

All versions
MD COVID Alert minted1400023
October 24, 2022


Uploaded:October 24, 2022 at 8:46AM UTC

File size:12.41 MB


MD COVID Alert minted1400010
September 19, 2022


Uploaded:September 19, 2022 at 3:24PM UTC

File size:12.41 MB


MD COVID Alert minted1200014


Uploaded:April 12, 2022 at 10:51PM UTC

File size:12.31 MB


MD COVID Alert minted1200004
February 1, 2022


Uploaded:February 1, 2022 at 11:27PM UTC

File size:12.31 MB


MD COVID Alert minted1100063
January 27, 2022


Uploaded:January 27, 2022 at 9:36PM UTC

File size:11.96 MB


MD COVID Alert minted1100011
November 16, 2021


Uploaded:November 16, 2021 at 11:12PM UTC

File size:11.96 MB


MD COVID Alert minted1000003
September 18, 2021


Uploaded:September 18, 2021 at 12:59AM UTC

File size:11.71 MB


MD COVID Alert minted900020
August 25, 2021


Uploaded:August 25, 2021 at 12:55AM UTC

File size:11.48 MB


MD COVID Alert minted900018
August 24, 2021


Uploaded:August 24, 2021 at 11:17AM UTC

File size:11.48 MB


MD COVID Alert minted900009
August 16, 2021


Uploaded:August 16, 2021 at 4:42AM UTC

File size:11.48 MB