While Canada will allow Americans to cross the border starting Aug. 9, how you interact with the border officials will be different than before the pandemic.
Subject to limited exceptions, all travelers must use the ArriveCAN app or website to submit their travel information to Canadian officials before coming to the border crossing. The app/website will have users upload a variety of documents, including a photo of their vaccination card and COVID-19 test results. The app is available on the Apple App store and Google Play.
When you arrive at the border, Canadian border agents will ask to see an ArriveCAN receipt, which can be in the form of a printout or on your phone screen.
The ArriveCAN app has been in place for some time and has generally been used by Canadians for contact tracing and for Canadian citizens crossing the border and wanting to avoid the 14-day quarantine.