There are lots of cool-sounding calorie- and -fitness trackers—Fitbit, Nike+, Jawbone UP, Gear Fit, LifeTrak—but how do you really know if it's the right one for you unless you buy it?
Lumoid is a service that will send you—for an entire week—any five gadgets that you've always wanted to try out in your day-to-day life. If you find the perfect thing that works for you, great! You can buy it. If you don't? You send 'em all back (paying no more than $20 for the "rental").
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