GPS & Tracking

Apple Watch Series 1

Polar V800

Suunto Spartan Ultra

Mio Alpha 2

Casio Pro Trek 3100

Timex IQ + Move

Tom Tom Spark 3 Music + Headphones

TomTom Spark Cardio

Best Garmin Forerunner for Marathon Training

Garmin Forerunner 35

Garmin fenix 3

Garmin vivosmart HR+