Hi @Mobilenovice,
Yes, that's correct.
If you're travelling between Canada and the USA, you'll need to purchase separate Roam Beyond add-ons for each country, as the add-on is destination-specific.
As you'll be crossing the border and returning to Canada on the same day, it may be worth looking at the 1-day add-on option for the USA if you're only spending a short period there. You can then use a separate add-on for Canada to cover the rest of your trip.
We'd recommend planning your add-ons around your itinerary to make sure you're covered in both countries when needed.
Have a fantastic trip!
Regards,
Gemma M
The iD Mobile Social Media Team