Glossary

Shows how your body responds to stress and physical activity by analyzing heart rate and movement. It reflects both mental (e.g. nerves before a presentation) and physical (e.g. illness) stress.

Learn more about Stress Gauge here.

This is your body’s natural balance — when you’re calmly focused, like while reading, working, or having a relaxed chat.

Learn more about the Calm Zone here.

Your body’s physical response to a situation — from emotions or activity.

• High reactivity: You might be feeling stressed, excited, or active

• Low reactivity: Often shows up during rest or sleep

Learn more about the Reactivity here and here.

A state shown in the Timeline under the Stress Gauge, typically detected during exercise or significant movement.

A state shown in the Timeline under the Stress Gauge, typically detected in the minutes after physical activity as your body begins to rest and recover.

The “fight-or-flight” system. It increases reactivity — quickens your heart rate and breathing, and gets you ready for action.

Learn more about the Sympathetic Nervous System here.

The “rest-and-digest” system. It decreases reactivity — slows your heart rate, deepens breathing, and helps your body recover and repair.

Learn more about the Parasympathetic Nervous System here.

The number of times your heart beats per minute (BPM).

Learn more about HR here.

Different ranges of heart rate (Zones 1–5) based on your maximum heart rate, used to show how hard your body is working during exercise—from light activity to maximum effort.

Learn more about HR Zones here.

The amount of time your heart rate spends in different intensity zones. It reflects how hard your body is working during physical activity.

Tracks the steps you take throughout the day, shown in 30-minute blocks.

Learn more about Steps here.

Shows how active you are using 5 levels: Rest, Light, Mild, Moderate, and Vigorous.

• Higher = more movement

• Lower = resting or sitting still

Learn more about Motion here.

Shows how much time your body spent in a reactive (stressed) state throughout the day. This is shaped by how often you feel stress and how quickly you recover.

Learn more about Stress Duration here.

How fast your body returns to a calm state after stress.

Learn more about Stress Recovery here.

How often your body enters a reactive state during the day.

Learn more about Stress Frequency here.

Covers any movement that gets your heart into Zone 2 or higher — from a workout to a long walk.

• Daily Active Time: How long you stayed active each day.

• Regularity: How often you stay consistently active. Reaching 15 minutes in HR Zone 2 or higher counts as an active day and contributes to your regularity.

Learn more about Intense Activity here.

The number of times your heart beats per minute while you’re awake, still, and relaxed. For most adults, a normal RHR ranges from 60-100 beats per minute.

• Lower RHR: Often means better fitness and recovery.

• Higher RHR: Can signal stress, poor sleep, or illness.

Learn more about RHR here.

Shows how consistent your bedtime and wake-up time are.

Learn more about Sleep Regularity here.

The number of times you wake up during the night.

Learn more about Awakenings here.

Your total sleep time each night. Most adults need 7–9 hours.

Learn more about Sleep Duration here.

Your average sleep time over a longer period.

Learn more about Sleep Duration here.

The different phases your body cycles through during sleep: light sleep, deep sleep, REM sleep and awake. Each stage plays a unique role in physical recovery, memory, and overall rest.

• Light: The stage that helps your body start to relax. It makes up the largest portion of your sleep and prepares you for deeper stages.

• Deep: The most restorative stage, essential for physical recovery, muscle repair, and immune support.

• REM: The stage where most dreaming occurs. It supports memory, mood, learning, and overall brain function.

• Awake: Brief periods of wakefulness during the night. These are a normal part of healthy sleep cycles.

Learn more about Sleep Stages here.

Measures how much time varies between heartbeats — a sign of how well your body is recovering.

Learn more about HRV here.

Your average HRV during sleep. Higher HRV often means better recovery.

Learn more about HRV here.

A feature that helps you tune into your body and emotions by encouraging regular self-reflection. It supports interoceptive awareness—your ability to notice internal cues—and can improve how you understand and manage your emotions.

• Random Vibrations: Check-in vibrations, not related to stress.

• Prolonged Stress Vibrations: Vibrations received when stressed for a specified time.

Learn more about Check-in here.

A habit tracker for logging physical or non-physical activities, helping you see how they affect your well-being. It adds context to your Timeline and offers insights into heart rate metrics, including zone breakdowns.

You can enable vibrations for heart rate thresholds or zone changes. Activities like walking, running, and cycling are auto-detected, but manual logging is recommended for accuracy.

Learn more about Activity here.

A feature designed to help you reflect on your day and data through personalized, science-based daily reports. It turns your health data into meaningful insights and guidance, with tone and length that you can customize.

Learn more about Reflections here.

A feature offering short, guided exercises to support your desired state of mind—anytime, anywhere, with no equipment needed. Each session falls into one of four categories: Return to Calm, Harness Stress, Boost Energy, and Feel Positive.

Learn more about Intentions here.

Function that allows you to disable Bluetooth on your NOWATCH, stopping all wireless signals while still collecting and storing data. Useful for reducing EMF exposure and saving battery.

Learn more about Flight mode here.

Experimental features that are still in development and available only to users who request access to the Beta Group. These features may be unstable, and user feedback helps improve them before public release. Access is limited and reviewed within 30 days.

Learn more about Beta access here.

The built-in software that controls how your NOWATCH device functions. It runs directly on the device’s hardware and can be updated to improve performance, fix bugs, or add new features.

Learn more about Firmware here.

A newer version of the NOWATCH app that includes improvements, bug fixes, or new features. Keeping the app updated ensures the best performance and access to the latest tools.

Learn more about app update here.