Xiaomi Mi Band 4 review: A $70 Fitbit rival with amazing battery life

The Mi Band 4 undercuts rival fitness bands with excellent features at half the price.
This budget band wins on battery life

Xiaomi Mi Band 4 review: A great cheap fitness tracker for under $100

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I've tried a lot of fitness trackers, and this under-$50 one is truly great - CNET

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Which smartband is better, Fastrack Reflex Beat or Mi Band 4? - Quora