Apple Watch Series 12 and Garmin Cirqa sleep scores compared over one week
A tech reviewer tested Apple Watch Series 12 and Garmin Cirqa sleep tracking accuracy for seven nights.
Calibration period required for new metrics
The Apple Watch needed seven nights to establish baseline metrics before showing reliable data. This process allows the device to identify outliers in heart rate variability and respiratory rate. The new Readiness Score aggregates sleep quality against activity levels to produce a readiness rating.
Wearers used both devices simultaneously
The reviewer wore the Apple Watch on the left wrist and the Garmin Cirqa on the right. Both watches recorded data throughout the week to compare accuracy directly. The comparison focused on sleep scores and readiness metrics from the same nights.
Initial score differences were expected
The reviewer anticipated that Apple and Garmin would provide different scores at first. General trends in the data showed encouraging alignment between the two devices after calibration. The test highlighted how long-serving features on other wearables differ from this new Apple metric.
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