If you are looking for a dedicated device for running, Garmin Forerunner 55 could just be it
Garmin Forerunner® 55, Running Smartwatch
Garmin Forerunner 55 review: Well-rounded and cheap
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Garmin Forerunner 55 review: Well-rounded and cheap
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Easy-to-use running watch monitors heart rate (this is not a medical device) at the wrist and uses GPS to track how far, how fast and where you've run
Garmin Forerunner 55, GPS Running Watch with Daily Suggested Workouts, Up to 2 weeks of Battery Life, Aqua
Garmin Forerunner® 55, Running Smartwatch