Relatedly on twitter: https://twitter.com/JakubKrupa/status/1057665110976663552 downthread

"The most difficult part of the process - confirmation of ID - was not being done through an automated process: applicants didn't have to use the controversial app to scan their passports. Of those who voluntarily decided to use it 30% FAILED."

And as various people have pointed out, unless a deal appears in a really short timeframe, all 3m EU nationals living in the UK will have to go through this process in order to continue working or renting in the UK. https://www.bbc.co.uk/news/uk-politics-46035919