Methodology

How the calculations work

This app estimates remaining lifetime using a bundled country and gender life expectancy table, then subtracts routine time from the remaining days to estimate discretionary time.

Core formula

remaining_life_years = max(life_expectancy - current_age, 0)
remaining_days = remaining_life_years * 365.25
routine_hours_per_day = sum(daily routine inputs)
free_hours_per_day = max(24 - routine_hours_per_day, 0)
total_free_hours_remaining = free_hours_per_day * remaining_days

Defaults

The routine sliders start from age-aware defaults for sleep, work or study, commuting, meals, hygiene, chores, leisure screen time, and digital admin. Users can override all of them before calculation.

Insights

Insight cards derive from the same stored profile. Examples include remaining meals, Fridays, parent visits, child weekends before adulthood, full moons, and routine months lost to sleep or commuting. Relationship-based insights appear only when enough optional profile detail is present.

Data notes

The bundled dataset is an indicative MVP table compiled from recent public life expectancy reference points and broad weather assumptions. It should be treated as reflective, not medical or actuarial advice.

Source references are summarized from WHO, UN World Population Prospects, and general time use benchmarks mentioned in the original product brief.