The Fitbit Alta HR has a very similar design to the standard Alta but it adds heart rate monitoring, a different clasp and more
advanced sleep data, as well as a slightly extended battery life.
Not exact matches
This is way more
advanced than the smartphone apps and wrist - worn devices that rely just on movement
data to judge the quality of your
sleep.
The Alta HR also offers more
advanced sleep tracking
data but it still lacks elevation
data and waterproofing.
They also all track
sleep, though the
data collected will be more
advanced on the Alta HR, with Fitbit introducing light
sleep, deep
sleep and REM
sleep tracking on the new device.