You can't change the snooze of an alarm in the Clock app on your iPhone – it's always 9 minutes. However, you can work around it by setting a series of alarms that go off at different intervals.

An alarm clock that simulates the sun may be especially useful during dark winter months when the sun rises later but you still have to wake up at the same time, experts said.

Chrome: Timer Tab is a free extension for Google Chrome that combines the functions of a countdown timer, alarm clock, and stopwatch, and has the ability to notify the user when an alarm goes off ...

The snooze feature was added to alarm clocks back in the 1950s. Early clock makers wanted the snooze time to last ten minutes, but those early mechanical clocks involved a lot of moving gears.