A quick morning read of how recharged your body is — so you know whether today is for training hard, going easy, or resting.
Enter your average resting heart rate and HRV over the past ~6 months (from Apple Health). Your daily score is measured against these, so they're required.
Enter both your resting HR and HRV to continue.
Enter your mobile number — your Body Battery syncs across all your devices.
Enter a valid mobile number (at least 6 digits).
Today's Numbers
Log today's session — it counts as spent battery now, and automatically becomes "yesterday's training" tomorrow.
Engines
Reasons
Today's recommendation
Workout options
This is an estimate, not a medical or official Apple metric. Use it with common sense and avoid hard training if you have pain, illness, dizziness, or unusual fatigue.
Think of your body like a phone battery. Sleep and rest charge it; hard workouts, poor sleep, stress and illness drain it. This score is a quick read of how charged you are this morning — from 0 (running on empty) to 100 (fully charged).
Why bother? Training hard on a low battery doesn't make you fitter — your body only gets stronger while it recovers. Pushing when you're depleted just digs a deeper hole and invites injury or burnout. Training hard when you're charged is where the real gains happen.
How to use it each morning:
What moves the number: last night's sleep, how your resting heart rate and HRV compare to your normal (a higher resting HR or lower HRV means you're not fully recovered), your recent training load, how sore and how energetic you feel, and any workout you've already done today.
Over weeks the trend matters more than any single day. A steadily rising battery means recovery is winning; a slow slide means it's time to back off, sleep more, and eat enough.
⚙ Settings
Baselines · set once
These barely change day to day — set them from your average over the past ~6 months. Used to measure today's resting HR rise and HRV drop.
Data · this device
Entries are saved on this device only. Export to back up or move to another device; import to restore.
Auto-fill from Apple Health
An iOS Shortcut reads your latest Resting Heart Rate and average HRV from Apple Health and opens this app pre-filled. Tap below to add it (you may need to enable Settings → Shortcuts → Allow Untrusted Shortcuts):
➕ Add “Body Battery” shortcut to iPhoneRun it each morning (so HRV reflects overnight recovery). It auto-fills RHR + HRV and logs the day; type sleep / training-load yourself. Tip: it opens in Safari, which has separate storage from a home-screen app — so use the app in Safari for the data to match.
Open this app with values in the URL — the app fills the fields (add &save=1 to auto-log, &sleephrs= for sleep hours):
https://body-battery.ensuenotech.com/?rhr=62&hrv=38&cal=450&save=1Account
Signed in as —. Your data syncs to the cloud across your devices.