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Sleep trackers: understand the data before you buy

A tracker can be useful for trends, but it does not measure sleep like polysomnography. Sleeple separates the signal actually captured, the algorithmic estimate and the interpretation shown by the app.

Our editorial rule: no sleep score, REM value or deep-sleep percentage will be presented as clinical truth simply because an app displays it. Commercial comparisons will look for published validation of the exact model whenever available.

1. Understand accuracy

AccuracyAre sleep trackers actually accurate?StagesCan they measure REM and deep sleep?

2. Understand the numbers

ScoreWhat does a sleep score really mean?ComparisonWatch or ring for sleep tracking?

3. The future Sleeple buying method

We will compare the exact model, overnight comfort, real battery life with tracking enabled, sensors, reported metrics, data export, subscriptions, privacy policy, published scientific validation and total cost over several years.

4. Next guides in the cluster

Coming nextUnder-mattress sensor vs wearable
Coming nextHRV, heart rate and recovery
Coming nextPersonal data and privacy
Coming nextSmart alarms and wake windows

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