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By Chris Gullo

garminGarmin Fit - Free

Garmin's fitness app Garmin Fit is the longstanding company's answer to the various fitness sensor apps being released by its start-up competitors. The app works in conjuction with a $49.99 ANT+ wireless adapter to track running, cycling, and heart rate metrics collected via Garmin wearable sensors.

According to Garmin’s website, compatible accessories include its Foot Pod, both the regular and premium heart rate monitor, and speed/cadence bike sensor. Garmin currently only offers the ANT+ adapter for the iPhone, but the Android version of the app will allow users to track time, distance, speed, and calories burned. The workout data collected by Garmin’s app can then be uploaded to the free Garmin Connect online fitness community. The data is aggregated as charts, graphs, reports, and map representations of the route traveled during a workout, gathered via GPS.

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NASA astronaut Scott Kelly checks out the Microsoft HoloLens aboard a space station on February 20, 2016. The device is part of NASA's project Sidekick, which is exploring the use of augmented reality to reduce crew training requirements and increase the efficiency with which astronauts can work in space. (Photo by NASA via Getty Images)