Over 600,000 people using the NHS Covid-19 app in England and Wales received self-isolation alerts in the week of July 8-15.
Data shows that 618,903 alerts were sent, an increase of 17% from the previous week.
Companies complain that alerts cause serious staff shortages and affect services.
However, some are workingFully vaccinated key urs will be exempt from self-isolation if reported by the app as close contact of a positive case.
Business Secretary Kwasi Kwarteng , told Hfrance.fr that a "very narrow " list of jobs would be published today.
Self-isolation for all reported fully vaccinated people by the app as close contacts are due to be deleted by August 16, although there are calls for that deadline to advance.
The alert from the The application is advisory only and not enforceable by law, unlike a phone call from the Test and Trace team.
"If you're ping you need to isolate yourself. I know this poses challenges, and we're seeing reports of shortages that we're monitoring, but the rules are clear and I think they should be followed ", Mr. Kwarteng told the Today program on Hfrance.fr Radio 4.
The latest government figures show that there are has 44,104 other daily coronavirus cases in the UK, with 73 coronavirus-related deaths.
Prime Minister Boris Johnson has warned that cases could rise further this week, as most legal restrictions have ended in England.
Its spokesperson said the app does "what it's designed to do ".
"We are aware iimpacting certain industries and services and working closely with them, especially food and supermarkets .... we have a strong and resilient food supply chain.
But supermarkets have warned that they may have product shortages due to staff self-isolation.
The Co-op said it was "lacking some products", while Iceland said that stores may have to be closed.
However, Iceland urged shoppers not to panic to buy, saying it is not necessary.
Until then , dozens of councils have suspended the collection dustbins due to understaffing due to isolation and the fuel supplier BP hastemporarily closed "a handful of sites " due to the absence of Covid staff.
En England 607,486 alerts were sent to app users during the period July 8-15, and a further 11,417 were sent to Wales.
There were fewer pings per case in England during this period, with 2.8 pings issued for each coronavirus case reported.
On average 3.2 pings were sent per case reported during of the last month.
L ' Scotland app has issued less than 60,000 notification "pings since its launch in September 2020.
Another record then for the number of people cracked by the NHS Covid-19 app and sent into isolation.
For businesses struggling to manage the impact on their employees, it will be more proof than a different approach The fact that thenumber of pings did not increase even more over the course of a week as the number of cases accelerated, may be an indication that some people have removed the app, although we have to be careful of don't over-extrapolate a week 's numbers.
Its advocates point out that many of the complaints about the enforcement concern broader health policy rather than the technology itself - the fact that people who may have come in contact with the virus should self-isolate even if they are fully vaccinated ated is a policy that also applies to traditional testing and tracing, and will not change until August 16.
A man, who was heavily involved in the design of the app, told me that people don't realize that it works on many levels - "even if someone 'one ignores the message to self-isolate, telling them they have been exposed to the virus is likely toget them to behave more carefully. "
He also said that while the anonymous nature of the app meant that only limited data could be extracted from it, there was some useful information and early for epidemiologists on virus spread and R rate
The government always insists the app is doing the job it is doing. was designed - but there will be increasing pressure from industry to change it to allow respondents to be tested rather than isolate them.
When the new secretary to health Sajid Javid replaced Matt Hancock, it was reported that he wanted the sensitivity of the app changed so that he sent fewer alerts. But that seems to be out of the picture agenda at the moment, with the Department of Health insisting that there are no immediate plans for changes.
App downloads continued to increase to 26,826,748 from 26,523,853 the previous week.
La Hfrance.fr understands that there is no way to know if the app has been deleted, but # DeleteTheApp is all the rage on Twitter today.
A recent YouGov poll suggested that one in ten users removed the app, after installing it first.
Those aged 18-24 were most likely to have removed the application after installing it, based on the data.
How does the NHS Covid application work?
People in England and Wales can download the NHS Covid app (Northern Ireland and Scotland have theirs).
If you use the app and spend enough time near another person with them, you will receive an alerte "ping " if they later test positive for Covid-19 and share the information with the app. The app uses the Bluetooth signal to determine if your phone has recently been within 2m of theirs for at least 15 minutes.
If you're "ping " it's you advised - but not legally required - to self-isolate for up to 10 days.
During the same week up to 'As of July 14, 259,265 people in England have tested positive for the coronavirus, a 33% increase from the previous week.
NHS Test and Trace said it was was the highest weekly number of people testing positive since January.
The service said it had identified 475,465 people as close contacts of someone who tested positive for the coronavirus , and had been able to contact 94% of them