Your daily picture — method and limits

On a supported phone, the rear camera and flash capture small changes in light through the fingertip. The app uses this optical pulse signal to estimate pulse rate and variability between detected pulse peaks. Place a finger gently over the camera and flash, sit still and follow the in-app signal guidance. Excess pressure, movement, cold fingers or unsuitable camera hardware can affect the result.

The front-camera option estimates a pulse signal from colour changes in a selected facial region. Even lighting, steady positioning and visible skin are needed. Face and finger capture use different signal paths; results should not be assumed interchangeable. Compare your records under similar conditions using the same method.

After preparation, the app requires 45 seconds of usable signal. Five short daily questions follow. Preparation, poor signal and interruptions can increase total time. The app applies signal-quality checks and can stop an interrupted capture; passing those checks is not proof of clinical accuracy.

Pulse and HRV estimates are derived from camera signals. Calm and energy indicators are calculated interpretations of available pulse metrics and reference values. Sleep-related indicators also use your daily answers, including the sleep times you enter. The camera does not measure sleep, emotions or mental health. These indicators can differ from how you actually feel.

Personal comparisons depend on the available records and the reference used for that result. If a personal reference is not established, it must not be read as a comparison against your usual state. A change between days does not establish its cause.

No product-specific clinical validation report or reference-device accuracy results are published here. We make no claim of medical-grade accuracy or equivalence to ECG. Short camera recordings and pulse-derived variability are not interchangeable with clinical recordings. Functional software tests verify software behaviour, not measurement accuracy across people or devices.

Reload Well does not measure blood pressure, blood oxygen, body temperature, blood glucose or ECG and does not detect heart rhythm disorders. Its readings should not be used to assess symptoms, change medication, determine fitness for work or exercise, or make treatment decisions. For a health concern, consult a healthcare professional.

Measurement images are processed on your device and are not uploaded as measurement footage. Account information, derived readings and daily responses are processed to provide the service. The Privacy Policy describes these data and integrated SDK data flows. Consent settings and account deletion are available inside the app.