GPS & Tracking

TomTom Spark

Garmin D2 Charlie

EPSON RUNSENSE SF-810

Withings Pulse Ox

Polar M200

Apple Watch Nike+

Pebble 2 SE

Garmin Forerunner 735xt

Fitbit Flex

Polar M600

TomTom Spark Cardio

Suunto Ambit3 Peak