The Canberra community seem to have accepted the new QR code login requirements, although business owners admit it is like "a full time job policing it."
There was a 140 per cent increase in check-ins in the two weeks before the new requirements came in.
The app is now mandatory on Canberra's bus and light rail network, in taxis and rideshare vehicles.
It is also required when entering retail spaces such as supermarkets, petrol stations and clothing stores.
Owner of fashion boutique Momento Dezigns in Griffith, Roslyn Wright said she her customers have been happy to sign in, but often forget.
"They do forget and it's like almost a full time job policing it," she said.
"Sometimes people are just walking around the street and they see something pretty in the window and they forget, so you have to have eyes in the back of your head but everybody is happy to be reminded."
She welcomed the new regulations, and said she put up three QR codes around the store.
"They need to feel safe in their space as well, and we need to feel safe in here as well," she said.
More than 4000 businesses and services signed up for the contact tracing app in preparation for the new rules on Thursday.
ACT Health said people who are unable to use the app for any reason are able to be checked in by the business or added as a guest on a friend's phone.
Health Minister Rachel Stephen-Smith said Canberrans were now used to the process of checking in.
"It is something, I think, we get used to. We've talked before about the habit building we've done over the last 18 months, and checking in is now becoming a habit," she said.
"It's something that we just need to continue to remember."
Transport Minister Chris Steel said people should also register their MyWay cards when travelling on public transport. A registered MyWay card is required for people who do not have a smartphone to use the check-in app.
"This is to ensure an extra level of information in the event that you are unable to check in for some reason, so our contact tracers can use the information from the MyWay system to get in touch," he said.
