Vigor: Body Energy

See your whole day as one energy curve: what charged you, what drained you, what tonight's sleep gives back. Computed on your iPhone. Pay once, no subscription.

Vigor turns the health data your Apple Watch already records into a single body energy score from 0 to 100 - it charges when you rest and drains when you are stressed or active, so you can see at a glance whether to push hard or take it easy. Inspired by the energy-reserve gauges on other fitness watches, but built independently on Apple Health and computed entirely on your iPhone.

WHAT YOU GET

• A day chart that shows your whole day as one energy curve, with an activity intensity band behind it, your morning peak, and tappable markers for sleep, naps, and workouts.
• A ledger of everything that charged and drained you today - what, how much, when, and for how long.
• A sleep projection: what you will wake near if you sleep now, and how much sleep it takes to reach a good level.
• A morning readiness card: a recovery score built from your night, your heart data, and yesterday's load.
• A live 0 to 100 body-energy dial with color zones and a plain-language read.
• A weekly summary, a 30-day history with a trend line, and "Your patterns" insights (how sleep moves your mornings, what workout days cost, your best and worst weekdays).
• Day tags (alcohol, caffeine, sickness, travel) and sensitivity presets (gentle / balanced / responsive) so the model fits YOUR body - plus a sleep need setting and a recalibrate button.
• An Apple Watch app with the score, the day's charged and drained totals, and the phone's energy curve in one wrist raise - plus complications and Home Screen, Lock Screen, and StandBy widgets, including a full-day-curve large widget.
• A morning briefing and an optional evening outlook that tells you what tonight's sleep sets up for tomorrow.
• Circles: invite friends and see each other's energy at a glance - opt-in, via your own iCloud. Send a friendly nudge when someone runs low; only your name and score are shared, never your health data.
• Eight different looks, each with light and dark palettes: a clean editorial theme, a cute mascot theme, a true-black OLED theme, a calm nature theme, a playful cat theme whose pose tracks your energy, a retro pixel theme, a flowing-silk theme threaded with gold, and a calm formal navy theme. Switch anytime, try them on live.

HOW IT WORKS On first run Vigor reads about two months of your Apple Watch history (heart rate variability, heart rate, resting heart rate, sleep and its stages, workouts, active energy, wrist temperature, VO2 max) and builds a personal baseline, so you get a personalized score right away. Overnight it sets a morning starting level from how well you recovered; through the day your heart rate and activity move the number up and down. Naps give a bounded boost, and workouts count even without heart-rate data. It is a running balance, like a battery for your body.

PRIVATE BY DESIGN Everything is computed on your device: no Vigor account, no Vigor server, no ads, no trackers, no analytics. Your health data never leaves your iPhone. The only thing you can choose to share is your energy score: opt-in Circles sends your display name and current score to the friends you invite, via your own iCloud - never through any Vigor server, and never your health data. You can turn off Vigor's Health access anytime in iPhone Settings.

NO SUBSCRIPTION Vigor is a one-time purchase - no subscription, no in-app purchases. It works in 10 languages and follows your phone's language.

NO APPLE WATCH? EXPLORE FIRST Tap "Explore with sample data" to see the whole app populated with three weeks of realistic sample days - no watch, no permissions.

A WELLNESS TOOL, NOT A MEDICAL DEVICE Vigor is for general wellness and information only. It is not a medical device and is not intended to diagnose, treat, cure, or prevent any disease. Always consult a qualified professional for health decisions. Vigor is not affiliated with, endorsed by, or connected to any fitness-device maker.