Questions, bugs, or feedback: thomas.frosio@gmail.com. I read every message. Please include your iPhone model and iOS version if you are reporting a problem.
No. Vigor reads Apple Health, so any tracker that writes there works - an Apple Watch, but equally a Garmin, Oura, Whoop, Fitbit, Polar or Withings device, or a third-party sleep app. What it needs is the data, not a particular brand: heart rate, heart rate variability, sleep, and workouts. Sleep-stage detail needs a source that records stages (an Apple Watch on watchOS 9 or later, or a tracker such as Garmin or Oura that writes stages to Health); without stages Vigor still scores the night from its duration and your sleeping heart rate. The optional watch app on your wrist is the one part that is Apple Watch only. With no tracker at all you can turn on sample data in Settings, under Data, to see how the app works.
Vigor learns your personal baseline. On first run it reads about two months of your Apple Health history, so it usually has a good baseline right away; if you are new to wearing a tracker it improves as more data accumulates.
No. Vigor is a general wellness and information tool. It is not intended to diagnose, treat, cure, or prevent any disease. Wrist-worn sensor readings are non-clinical, so the score is an estimate. Always consult a qualified professional for health decisions.
Yes. Your health data is read from Apple Health and used on your device to compute your score; your health data never leaves your device. There is no account, no Vigor server, no ads, and no analytics. The only thing you can choose to share is your energy score with friends, through the opt-in Circles feature (see below), via your own iCloud. See the Privacy Policy for details. You can turn off Vigor's access anytime in Settings, Privacy and Security, Health.
Circles is an optional, opt-in way to share energy with friends, and it works one friend at a time. Each connection is separate and private: your friends cannot see each other, and they cannot see who else you are connected to. Only your chosen display name, an optional avatar, and values derived from your energy score are shared - never your health data (heart rate, sleep, and so on). The shared data lives in your own Apple iCloud; there is no Vigor server, and the developer cannot read it.
You decide, for each friend separately, what that person sees: the score and its zone always, and then only what you allow - the trend arrow, your week variation, your morning starting number, how much the night gave back, your average morning, your streak, or the rough shape of your day. You can pause someone without disconnecting, mute their nudges, or remove them entirely, which stops sharing in both directions and deletes what you shared with them.
Open the Circle tab. Give a friend your short join code (for example
A1B2-C3D4) or let them scan the QR code shown there with the Camera
app. To add someone, enter their code under "Add a friend".
A code only lets you ASK. It sends the other person a request, which they accept or decline, and nothing is shared in either direction until they accept - so handing out your code never exposes your number by itself. If you decline a request, the other person is simply told nothing; their request quietly expires. Both people need Vigor and an iCloud account, and both need the current version of the app. A join code expires after 90 days; you can also get a new one at any time, which makes the old code stop working without affecting the friends you already have.
No. Vigor is a one-time purchase of USD 2.99 (or your local equivalent). No subscription, no ads, no trackers, no in-app purchases.
Open Settings inside Vigor and pick one of the eight looks: Modern, Kawaii, OLED, Nature, Neko, Pixel, Silk, or Formal. The picker shows live previews and a full-screen try-on, and every look has light and dark palettes; the app opens in its light look by default, and Settings > Appearance can follow the system or force light or dark. The optional Apple Watch app and the widgets follow your choice, or you can pick a different look directly on the watch.
Yes. In Settings, under Energy model, you can pick a sensitivity preset (Gentle reacts less to a single rough night, Balanced is the default, Responsive reacts more), set your personal sleep need (6.0 to 9.5 hours, or Automatic), choose the morning level the model aims for after a full recovery (60 to 90), and override the gauge style (ring, arc, or bar). If the score ever feels off after a long break or a sensor change, the Recalibrate button on the same screen rebuilds your baselines from recent data.
The watch app shows your current energy on the wrist, in the same look and with the same model settings as the phone; it refreshes when you raise your wrist. It adds watch-face complications and appears in the Smart Stack when it is most relevant (mornings, after workouts, when energy runs low). The score is computed on the iPhone and synced to the watch, so keep the iPhone app installed.
Day tags (alcohol, caffeine, sickness, travel) tell the model why your body signals look unusual, so it can adapt - for example a sick day recovers more gently, and a travel day tolerates a shifted schedule. Tags only affect the day you put them on.
Vigor's body energy model is built on published, peer reviewed research. These are the primary sources behind how it reads sleep, heart rate, heart rate variability, and training load. Vigor is a wellness and information tool, not a medical device, and does not provide medical advice.
Vigor is an independent app built on Apple Health and is not affiliated with, endorsed by, or connected to any fitness-device maker.