Because it doesn’t use GPS to track your movement, it works everywhere, including indoors.

The lightweight, quarter-sized MilestonePod measures the basics of distance and pace and a whole lot more using an accelerometer, including your leg swing, foot strike, ground contact and stride length. Because it doesn’t use GPS to track your movement, it works everywhere, including indoors.

You don’t need to carry your phone to record the info, either. Just sync the pod with the Milestone app when you get back to analyze your workout. The app will spit back your numbers and what each of them means. (Milestone says a low leg swing, for instance, can waste energy.) All the metrics are then merged into a single “Runficiency” score out of 100 so you can work on improving your grade.

The third iteration of the pod includes updated waterproofing—it should handle stream crossings just fine—improved accuracy and a longer battery life of 6 to 8 months. Even if you don’t check your Runficiency often, at $25 a pod, it’s worth popping one onto your running shoes for the mileage-tracking “shoe odometer” feature. Never again will you wonder if brick-like legs are coming from training or dead midsoles.
$25, Milestonepod.com