Police officers in England and Wales have been told they can download the NHS Cove 19 app on their personal smartphones and use them at work.
The National Police Chiefs Council (NPCC) issued the directive after conducting its own technical review of the software.
Individual officers and other police personnel will be notified on Wednesday.
The NPCC had earlier advised officers not to download the app on any device, while assessing its impact.
And yet they will be told not to install it on work handsets.
They usually have their Bluetooth functionality disabled.
And the automatic contact detection process relies on Bluetooth wireless signals.
A spokesman for the NPCC told BBC News that some of the personnel involved in the covert and special operations, as well as other sensitive characters, would be told on any phone until further notice. Do not install the app.
“It’s important that we are confident that the NHS app will work permanently for officers and staff across the country,” he said.
“And that’s why we recommend that officers and staff download this app on their personal, as opposed to their work tools.”
Following several changes to the previous test version, NHS Cove 19 was released to the general public on Thursday.
This is after the release of similar software in Scotland and Northern Ireland.
The NPCC was asked to change its policy by the Police Federation of England and Wales (PFW), which represents about 120,000 officers.
He said he praised the NPCC for being cautious, but said the well-being of its members was of “absolute importance”.
When two people’s phones come close to each other, NHS Kwid 19 logs in.
If one is later confirmed to have the corona virus, the other may be asked to isolate himself or herself for 15 days.
The app is designed to keep the identities of both parties secret.
Other functions include a way for users to log in to restaurants and other places of interest via a QR-barcode scan, and then receive notifications if the place was later linked to an epidemic. Be
As of 12 noon on Monday, the app had been downloaded more than 12.4 million times, Health Secretary Matt Hancock said.