Garmin CIRQA Nails Deep Sleep — But Fumbles REM Badly

Garmin CIRQA impressed on deep sleep, but weak REM detection keeps it from being a full sleep-tracking win.

Key takeaways

• Garmin CIRQA matched a reference deep-sleep reading 76.5 percent of the time, but its REM tracking was weak enough that it sometimes missed REM phases entirely...
• The finding comes from a review by postdoc and YouTuber Rob ter Horst, published on The Quantified Scientist and covered by Notebookcheck. The short version: *...
• That is the real story beneath the headline. CIRQA may be a step forward for Garmin’s display-less wearable strategy, but the test also shows why consumer sleep tracki...
• For product context, the device sits in the same Garmin wearables conversation as Garmin CIRQA Leak Ditches Screens for the Wrist War, while Garmin’s broader software-...

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Canonical source: https://mlxio.com/technology/garmin-cirqa-sleep-test