The GoBe2 can thoroughly analyze sleep by measuring your heart rate and motion throughout the night. Each morning, the GoBe2 provides a full data report of your sleep phases, as well as the duration of each. Within the app, you’ll see a chart with your REM and non-REM sleep cycles mapped out.
You are able to see sleep quality, duration, efficiency and number of times you wake.
In my experience, the sleep tracking was pretty accurate. I don’t always remember when I wake up in the middle of the night but the times I do, I’m able to match it up to the yellow markers in the chart.