Amazon Prime is particularly heinous about using dark patterns to confound users into risking forgetting but ultimately you’ve already paid for the month, year
I can confirm this to also be the case with most streaming giants plus the less-giant Shutter
Edit: comments have pointed out some notable exceptions such as services through Apple and HP Instant Ink
every subscription I’ve had through Apple ends at the end of the billing cycle, not immediately.
and yes if you contact them right away they’ll refund you. had this happen a couple of times when I was a day off on when I thought the subscription was renewing.
Same. I canceled my yearly Apple TV subscription and still had access to it until it was time to renew.