Fitbit's Alta is the fitness tracker that anyone that wants a fitness tracker should buy: it's small and comfortable, versatile, and has excellent battery life. At $169 it's decent value but Officework's sub-$100 price makes it properly tempting.
When we reviewed the Alta we praised its battery life and the amount of info it crammed into its tiny screen -- if you tap on it, you can switch between time and distance and calories burned and so on. It fulfills all the criteria for a good fitness tracker in that you can wear it all the time, and you can have it (relatively) accurately track the most important stats -- sleep, daily movement, and exercise -- automatically.
Officeworks has the Alta in small and large band sizes and a variety of colours -- teal, blue, black and plum -- for $98. That's a pretty significant drop from the $169 it debuted at, and unless you really want a chunkier and more capable Charge 2 there's no reason to spend more than Officeworks is asking. [Officeworks]