Fitbit Charge 4 review: Top fitness tracker with one problem - Wareable
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Fitbit、GPS搭載フィットネストラッカー「Charge 4」を4月に2万1980円で発売 - ITmedia Mobile
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Fitbit Charge 4 vs Garmin Vivosport: Which Fitness Tracker Should You Buy
Fitbit Charge 4 vs. Garmin Vivoactive 4: Which should you buy? | iMore
It seems to be a known thing that Fitbit has better sleep detection/interpretation than Garmin, but can anyone explain WHY? I recently bought a Venu, but still have a functioning Charge 4.
Fitbit Charge 4 vs Garmin Vivosmart 4: activity band face-off
Fitbit Charge 4 vs Garmin Vivosport: Which Fitness Tracker Should You Buy