PhysioTwin vs Body Charge

PhysioTwin is your physiological digital twin — a real-time stress detection and body battery tracking app powered by Apple Watch data. Using a hybrid 3-stage pipeline (ML activity classification, sleep-based threshold adjustment, and DC/AC stress formulas), PhysioTwin monitors your cognitive and physical stress, tracks recovery through guided activities, and provides personalized wellness insights. Medical Disclaimer: PhysioTwin is for informational and wellness purposes only and is not a medical device. It does not provide medical diagnosis, treatment, or medical advice. Always seek the advice of a physician or other qualified healthcare provider with any questions you may have regarding a medical condition, and before making medical decisions or changes to your health routine. If you think you may be experiencing a medical emergency, call emergency services immediately.

Body Charge turns your Apple Watch data into one simple number: how much energy you have, from 0 to 100. Like a battery, you recharge overnight with sleep and drain through the day with activity and stress. One glance tells you whether today is a day to push hard or take it easy. HOW IT WORKS Body Charge reads your sleep, heart rate, heart rate variability (HRV), breathing, wrist temperature and activity from Apple Health, and learns YOUR personal normal over time. Everything is compared to your own baseline — not generic averages — so the number actually fits you. WHAT YOU SEE • A live energy level, shown as a real battery that fills and drains • Your morning charge and how the day has spent it, hour by hour • A forecast of where your energy is heading before bedtime • What drained you most today — and what helped you recover • Sleep, HRV, resting heart rate and activity, each compared to your norm • A plain-language breakdown of exactly why your number is what it is TRENDS See your morning charge across weeks and months, track sleep debt as it builds, and keep your training load in a healthy range. ON YOUR WRIST A Watch app and complications put your charge right on your watch face. HONEST BY DESIGN When there isn't enough data, Body Charge tells you the number is an estimate instead of pretending to be precise. PRIVATE BY DEFAULT Body Charge has no server. Every calculation happens on your device. Your health data never leaves your phone. No account, no ads, no tracking. Body Charge is free. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Body Charge is a wellness app, not a medical device. It does not diagnose, treat, or prevent any condition.