Body battery score
A continuously updated energy score built from HRV, sleep, stress, and activity, designed to help you decide when to push and when to recover.
Built around Apple Watch and HealthKit
See your daily energy in a cleaner, calmer view.
BodyEnergy combines sleep, HRV, stress, activity, and personal baselines into one energy picture. It is built for people who want practical recovery insight without sending health data to someone else's cloud.
The app turns scattered health signals into one daily reading you can use for pacing, training, and recovery decisions.
Questions or product contact: info@simatik.com
Today
On device
Body Battery
82
Ready for a balanced day
7h 51m
Sleep and overnight recovery context
58 ms
HRV tracked against your own baseline
Low
Stress trend for the morning window
19
Configurable alerts and briefings
Apple Watch
82
Recovery-ready glance
Apple Watch Recommended
Richer wearable data makes the energy view much more useful.
On-Device Processing
Health calculations stay local according to the live privacy page.
One Daily View
Sleep, HRV, stress, and activity are kept in one readable story.
No Login Required
The core product promise avoids an account wall for health insight.
Features
Everything that matters, without visual clutter.
BodyEnergy focuses on the signals that actually help explain recovery and daily pacing, then keeps them in one clearer view.
Sleep quality and phases
See how your nights shape the next day with sleep duration, phase detail, and recovery context rather than a single isolated sleep number.
HRV and recovery signals
Track the inputs that matter for readiness: HRV, resting heart rate, respiratory patterns, and how they evolve over time.
Stress monitoring
Monitor stress trends with multiple calculation methods and clearer historical visibility, including data-quality-aware rendering during weaker watch coverage.
Workout and activity impact
Understand how exercise, movement, and busy days influence charge and drain instead of reading workouts and energy as separate stories.
Long-term trends and baselines
Build personal baselines from your own history and keep long-term perspective with local historical sync that can reach up to 20 years.
How it works
Three steps. One calmer mental model.
Connect health data, let the app learn your baseline, and use one daily energy view instead of multiple disconnected dashboards.
Connect your health data
On iPhone, BodyEnergy reads from Apple HealthKit. The privacy policy also documents Health Connect support for Android-side data flows.
Let the app learn your baseline
Initial insight starts quickly, then improves as the app builds a personal baseline from 28 to 365 days of your own history.
Use one daily energy view
Instead of checking sleep, HRV, stress, and workouts in separate places, you get one view built for day-to-day pacing and recovery choices.
Privacy
Health data stays on your device.
This is the strongest public claim from the live legal pages, and it belongs near the center of the homepage.
Local calculations first
BodyEnergy processes health data locally on the device. The current privacy policy states that body battery, stress, sleep analysis, baselines, and readiness calculations happen on device, with no health data uploaded to external servers.
No health data in analytics
No cross-app tracking
No advertising SDKs
No login required
Technical telemetry only
Anonymous analytics and crash data are limited to technical and usage signals, not health content. That keeps the public promise narrow, clear, and defensible.
Use the live privacy and support pages for the full current wording rather than relying on broad marketing claims.
FAQ
Short answers, same verified support guidance.
These answers stay anchored to the live support and privacy pages, not invented positioning copy.
Do I need an Apple Watch?
An Apple Watch is strongly recommended because HRV and heart-rate-rich wearable data make the energy view much more useful. The support page notes that phone-only data works, but with weaker results.
How accurate is the energy score?
It is a wellness estimate, not a medical measurement. Accuracy improves as BodyEnergy accumulates your personal baseline and reads more consistent HRV, sleep, and activity history.
Is my data sent to a server?
No health data is meant to leave the device. The current privacy page explicitly limits external communication to anonymous usage analytics, crash reports, and store-version checks.
What if sleep data is missing?
The support page explains that sleep data works best when you wear your watch overnight. The app also includes fallback modes for nights without full sleep data.
Ready to try BodyEnergy?
Download it from the App Store or Google Play, and use the live support, privacy, and terms pages if you want the current public documentation first.