I use my Apple Card primarily for purchases at the Apple Store for things like my MBP, iPhone and Apple Watch. All of which, are no interest for y months. I get 3% "cash back" that I transfer to my checking account.
I pay the required monthly balance plus any amount that I purchase during the month and end the billing month with zero balance before the next month's installment are added.
@leo Re: the #AppleCard and your discussion a couple of weeks ago on #TWiT, as an #AppleCard holder, my husband and I do NOT keep any balance. We charge ~$4000/mo and pay it all off each month.