[mnbvcxza]

I could do it for free with the alarm snooze feature on my 5 year old blackberry.

[chc]

That would create an alarm that you must reset every five minutes, rather than simply notifying you in the background that five minutes have passed.

[cwp]

Walking around with a phone strapped to your wrist would be awkward.

[btgeekboy]

And yet people strap them to their arms while running around town wearing nothing but spandex.