The couple Marta and Rui
“How much did we spend at the supermarket?” “No idea. You?”
Opens the app
Rui logs the shop at the till. Marta sorts it into a category later, on the sofa. Next morning they both open the same number.
What answers it
One number you both trust
Two salaries, one rent, one daily Safe to Spend that already counts bills and savings. One of you logs, the other can categorize later, and the app flags what is still uncategorized.