iPhone & Apple Watch

How am I today? One screen tells you.

Apple Health stores the raw data; it doesn’t spell out what it means for right now. Your Body Battery opens on Today — body battery, recovery, and the metrics that matter, with guidance you can act on.

The app reads Apple Health on your device and turns it into real-time energy, sleep quality, stress, and daily strain. A morning briefing sets the tone; contextual insights and a weekly narrative help you plan — without another account or cloud vault for your vitals.

iPhone (primary) · Apple Watch companion, complications & Home Screen widget · Requires Apple Health data

Built for people who already track health on Apple Watch

The Health app is a vault of numbers and charts — useful, but rarely prescriptive. Your Body Battery sits on top of that same Apple Health data and answers the question you actually ask each morning: how am I today? Recovery, sleep, stress, and training load in one scroll, with a fast mirror on Apple Watch — so you can decide whether to push hard or protect recovery, without shipping vitals to another company’s cloud.

Open the app before noon and get a morning briefing: wake body battery, last night’s sleep, today’s strain target, and recovery — plus a single line of guidance for the day ahead.

Scroll Today for contextual insights, sleep debt, and a scrubbable 24-hour drain timeline. When you want depth, dedicated Sleep, Stress, and Strain tabs — and Body Battery detail — are one tap away.

Everything the app does

Where Apple Health shows what was recorded, Your Body Battery shows what it implies — starting on Today, with deep dives when you want them. Here’s the full feature set on iPhone and Apple Watch.

Today home

Your default screen: hero Body Battery with wake start ring, recovery score, sleep/stress/strain row, contextual insight cards, sleep debt tracker, and a scrubbable 24-hour drain timeline. In the evening, a Wind-Down card shows sleep debt and a suggested bedtime window. Link through to Body Battery detail for breakdowns and trends.

Morning briefing

On first open before noon, a focused sheet summarizes wake energy, sleep score, strain target, and recovery — with one actionable line so you know how to approach the day.

Home Screen widget

Add “Today at a Glance” to your Home Screen: a small Body Battery ring with strain vs. target, or a medium layout with Sleep, Stress, Strain, and today’s target — projected forward between refreshes.

Body Battery (0–100)

Real-time energy with color bands and “started at” context. Detail view adds breakdown cards (sleep recharge, stress drain, activity drain, awake drain) and smooth timeline charts you can scrub to see what moved your score hour by hour.

Sleep analysis

Sleep score from your longest session: stages hypnogram, overnight heart rate, HRV, respiratory rate, efficiency, heart-rate dip, consistency, and sleep debt on Today and in the Sleep tab.

Stress monitoring

Stress score from HRV and resting HR vs. your rolling baseline. Timeline across the day, zones, workouts called out, and breakdowns like peak stress and recovery windows.

Strain & target

Daily strain with cardio, strength, and passive components; cumulative timeline; dynamic strain target from sleep, recovery, and yesterday’s load; HR zone summaries.

History & weekly review

Tap the date header for a calendar heatmap — switch metrics and jump to any day. Weekly summary adds a plain-language narrative (“strain target met 4/7 days…”) plus wake vs. end body battery and metric trend charts.

Glossary & what-if

Tap info icons for in-app glossary terms on any metric. What-if sliders on detail screens let you explore how sleep or strain might change your scores — without guessing.

Onboarding & notifications

Welcome flow, Health permissions, optional profile, up-to-90-day historical import, and on-device toggles for morning report, sleep summary, recovery insight, stress spike, strain target, post-workout, bedtime reminder, sleep consistency, weekly summary, optional daily digest, Watch haptic stress nudge, and quiet hours.

Settings & data

Light / dark / system theme, sync interval, subscription management, Health Data Check (authorized vs. missing samples), profile fields, data export, algorithm changelog, and links to policies for the stores.

Apple Watch

Today hub first: large Body Battery with wake start arc and three mini ring gauges for Sleep, Stress, and Strain. Swipe for full metric screens; complications for Body Battery, Sleep, Stress, and Strain; freshness shows whether numbers came from iPhone or were calculated on the watch.

iPhone — Today first, depth when you need it

The app opens on Today: one scroll for how you feel right now, recovery, insights, and your day’s drain. Tabs for Sleep, Stress, and Strain stay dedicated to deep analysis — each with the same date navigation, hero score, timeline, factor cards, and trend charts.

Today

  • Hero Body Battery gauge with wake “started at” ring and energy label
  • Recovery score from sleep, HRV, and wake energy — with plain guidance
  • Sleep, stress, and strain at a glance; contextual insight cards below
  • Sleep debt tracker and scrubbable 24-hour drain timeline
  • Evening Wind-Down with suggested bedtime window; morning briefing on first open
  • Weekly summary and calendar heatmap from the date header

Body Battery detail

  • Full breakdown: sleep recharge, stress drain, activity drain, awake drain
  • Scrub the timeline to see what moved your score hour by hour
  • Glossary links and what-if sliders to explore “what if I slept more?”

Sleep

  • Sleep score gauge with excellent → poor bands
  • Stage strip: awake, REM, core, deep
  • Overnight vitals sparklines and debt / efficiency cards

Stress

  • Live score mapped to calm → very high zones
  • Area chart across waking hours; sleep shown calmly
  • HRV & RHR context, time-in-zone, peak markers

Strain

  • Log-scaled daily strain with “target” marker
  • Build-up curve with workouts labeled
  • Cardio vs. strength vs. passive split and zones

Apple Watch — Today at a glance

The watch app leads with Today: a large Body Battery ring (with your wake start score as a ghost arc), energy label, and three mini gauges for Sleep, Stress, and Strain — no numbers cluttering the glance. Swipe vertically for full metric screens with compact gauges and sparklines. Fresh numbers prefer a recent iPhone sync; when that goes stale, the watch can calculate from on-wrist Health data and labels the source. Complications cover Body Battery, Sleep, Stress, and Strain.

Complications surface Body Battery, Sleep, Stress, or Strain on supported watch faces. Optional silent haptic nudges can tap your wrist when stress runs high — respecting quiet hours you set on iPhone.

Privacy by architecture

There is no sign-in, no social graph, and no Body Battery server that stores your vitals. Health data is read from Apple Health on device, scores are computed locally, and optional notifications are scheduled on-device. Export is available for your own records. Subscription billing is handled by Apple — we don’t receive your payment details.

Read the full Privacy Policy for App Store disclosure and contact information.

Get the app

Free on the App Store for iPhone and Apple Watch. Requires iOS 26 or later and Apple Health data.

Download on the App Store