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Overview Statistics

The Overview is a long term view of the data. For this purpose, data is aggregated on the day-level.

In the NOWATCH app, the Overview is conceptually splitted in two sections:

  • Awake Section (More info in our Support Knowledge Base):
    • Stress Duration: amount of time the user was under stress;
    • Stress Recovery: amount of time it took the user to recover from stressors, on average;
    • Stress Frequency: number of detected stressors;
    • Intense Activity: total minutes of intense activity;
    • Resting Heart Rate: Heart Rate under sustained rest;
  • Asleep Section (More info in our Support Knowledge Base):
    • Sleep Heart Rate Variability (HRV): HRV while sleeping;
    • Sleep Duration: amount of time the user was asleep;
    • Sleep Regularity: awake time and bedtime;

For each metric (eg, stress, activity, sleep, etc.), you get:

  • Daily values (provided there is a minimum 6 hours of wear time throughout the day);
  • A typical value and/or range: given the last N days, what is the expected range of values for a metric for a user.
  • A descriptive sentence: given the last X daily values, typical values and ranges, what is the interpretation we have of that metric behaviour.
    • Example: "Your stress recovery is improving lately".

More info in our Support Knowledge Base

Overview Data Structure

Each daily overview record contains the following fields:

Field Type Description
date date Date of the overview data.
Awake Metrics
stress_duration object Stress Duration data, including daily value, typical value, and deviations.
stress_recovery object Stress Recovery data, including daily value, typical value, and deviations.
stress_frequency float Daily stress frequency.
intense_activity object Intense Activity data, including daily duration and regularity.
resting_heart_rate object Resting Heart Rate data, including daily value, typical value, and deviations.
Asleep Metrics
hrv object Heart Rate Variability data, including daily value, typical value, and deviations.
sleep_duration object Sleep Duration data, including daily value and typical value.
sleep_regularity object Sleep Regularity data, including daily bedtime/waketime and typical bedtime/waketime.

Typical Range Structure

Most metrics include both a typical range and the value for that day.

The typical range is obtained as:

  • lower limit: typical_value-typical_deviation_lower;
  • upper limit: typical_value+typical_deviation_upper].
{
    "stress_duration": {
        "typical_value": 67.54,
        "value": 71.53,
        "typical_deviation_upper": 4.63,
        "typical_deviation_lower": 4.63
    }
}

Field Units

Each numeric overview field carries an implicit unit. The same unit appears as the x-unit extension on the corresponding property in the OpenAPI spec, so SDK generators and contract tests can pick it up.

Field family Unit Notes
hrv_* (numeric) ms RMSSD heart-rate variability, in milliseconds.
rhr_* (numeric) bpm Resting heart rate, beats per minute.
stress_duration_* min Minutes spent under stress.
stress_recovery_* min Minutes spent recovering from stressors.
stress_frequency_daily count Number of stressor events that day.
sleep_duration_* min Minutes asleep.
intense_activity_daily min Minutes of intense activity.
intense_activity_regularity ratio 0–1 score for how regular the user's intense-activity pattern is.
sleep_bedtime_typical, sleep_waketime_typical hour Hour of day as a float (9.0 = 09:00, 0.0 = midnight).
sleep_bedtime_daily, sleep_waketime_daily — ISO 8601 datetime (format-encoded; no separate unit).
*_descriptive — Free-form human-readable string.