"auto" snooze after x amountof time on the alarm

My buddy had a I phone 6 I think and his alarm went off and them sounded like it paused for a little bit than went of again a little later. or it could have been the alarm tone(radar) we were in a noisy kitchen and that alarm tapers off and then starts gain

was there a time like in the last year when there was like an auto snooze on the iPhone that after your alarm went off for a while it would "pause" for a little bit and then go off again?

the phone was a I phone 6 or 6s or 6 plus or 6s plus

I don't know what operating system he had either