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Pro Effortless Synching
The Fitbit Zip wirelessly syncs with both PC and smartphones via the Fitbit app, after getting it set up you don't even think about syncing, its just automatic.
Pro Tiny size
The Fitbit Zip is very small, so small you can forget its even with you most of the time.
Con Lacks a rechargeable battery
Zip runs on a 3-volt lithium-ion battery that lasts between 4 and 6 moths. It requires getting a new battery every time it runs out of charge.
Con Does not monitor sleep
Unlike the vast majority of fitness monitors, the Fitbit Zip has no sleep tracking mode.
Con No alarm
The Fitbit Zip has no alarm clock feature.