Sleep Analytics

Train Hard. Recover Smarter.

The only app that automatically connects your workouts to your recovery. Clinical sleep science, transparent scores, and complete privacy — all processed locally on your iPhone.

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FEATURES

Advanced Sleep & Recovery Metrics

Clinical-grade sleep analytics designed for athletes and health-conscious individuals

Sleep Score

A clinically-informed score combining duration, stages, efficiency, and continuity.

Sleep Stages

Detailed breakdown of REM, Light, Deep, and Awake time for full architecture visibility.

HRV Tracking

Heart rate variability during sleep — the clearest signal of recovery state.

Recovery Score

Connects workout load (CTL/ATL/TSB) with sleep quality for a true readiness score.

Sleep Efficiency

Time asleep vs time in bed. Identify fragmented sleep and its link to training stress.

100% Private

All processed locally on your iPhone. No cloud, no account, no data sharing.

Sleep Analytics

Start sleeping smarter tonight

Download on the App Store. No account required.

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Frequently asked questions

How is the Sleep Score calculated?
The Sleep Score combines eight clinical metrics using a transparent formula: sleep duration (against age-specific recommendations), sleep efficiency (time asleep ÷ time in bed), sleep onset latency, WASO (wake after sleep onset), percentage of deep sleep, percentage of REM sleep, nocturnal HRV trend, and sleep regularity (SRI). Each metric is weighted independently so you can see exactly which factor drove your score up or down.
What is HRV and why does it predict recovery?
HRV (heart rate variability) is the millisecond-to-millisecond variation between heartbeats recorded during sleep. A higher nocturnal HRV reflects a well-recovered autonomic nervous system and predicts greater training readiness the following day. Sleep Analytics tracks your 7-day HRV trend so that single-night outliers do not distort the signal.
How does Sleep Analytics connect workouts to sleep quality?
The app reads your Apple Watch or Garmin workout data — specifically CTL, ATL, and TSB (Training Stress Balance) — and correlates it with your nightly sleep metrics over a rolling 14-night window. Patterns such as late-evening hard sessions reducing REM, or heavy endurance days improving deep sleep, emerge automatically after two weeks of data.
Does Sleep Analytics work without Apple Watch?
Basic sleep duration and bed-time tracking are available without a wearable using iPhone motion data. However, sleep stage breakdown (REM, Deep, Light) and HRV require Apple Watch Series 4 or later running watchOS 9 or later.
Is my sleep data private?
Yes. All data — sleep sessions, workout imports, and scores — is processed locally on your iPhone. No cloud account is required, no advertising tracking is embedded, and no data is sent to external servers.