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Fitbit Alta HR vs Alta vs Flex 2: Design
Alta HR and Alta have interchangeable straps Flex 2 is waterproof Alta HR has more secure fastening
Fitbit Alta HR preview: Bringing function to form
Fitbit Alta HR vs Alta vs Flex 2: Features
Alta HR offers heart rate monitoring Alta HR offers more advanced sleep tracking thanks to HR racking Flex 2 has swim tracking
Fitbit Flex 2: Simple, stylish tracking
Fitbit Alta HR vs Alta vs Flex 2: Price
Alta HR is most expensive Flex 2 is cheapest Accessories and straps all cost extra
Fitbit Alta review: High praise for low-level fitness tracking