The baseline uses US Social Security's 2023 period life table, used in the 2026 Trustees Report. Age-specific remaining years are interpolated between birthdays. One year is 365.2425 days. Your baseline is fixed when you save your profile.

Lifestyle answers (smoking, exercise, stress, family longevity, sleep, alcohol, weight) add or subtract a few round years (for example, current smoker -5, regular exercise +2). These numbers are illustrative, not medical findings.

The date is a visual thought experiment, not a prediction. Action rewards are symbolic minutes, not medically earned lifespan. Waking hours assume 8 hours of sleep; heartbeats assume 75 per minute.