Seraph: Life Expectancy

Twelve questions, about a minute

Age, sex, smoking, height and weight, blood pressure, diabetes, how you rate your own health, education, income, marital status, exercise and alcohol. No account, no sign-in, and nothing to set up.

One number, in plain years

A single life expectancy, with the assumptions it rests on written next to it rather than buried.

The range around it

Twenty thousand simulated lifetimes, so you see the likely span and the chance of reaching any given age, not just the middle.

It runs on your phone

The estimate is calculated on your device from tables built into the app. There are no accounts and no sign-in, and we do not collect your date of birth.

Your odds, not just your average

A life expectancy is one point on a curve. The app draws the whole thing: the chance you are still alive at every age ahead of you, and the band where most lifetimes land.

Chance you are still alive

Probability of reaching each age. The shaded band is where most lifetimes land. Illustrative shape, not anyone's result.

In the app this curve is yours, redrawn from your own answers across twenty thousand simulated lifetimes.

Real mortality data, and a model we built ourselves

Seraph: Life Expectancy illustrates longevity using published US government and actuarial mortality data, Social Security and CDC life tables and actuarial mortality improvement research, adjusted for the health and lifestyle factors you enter. It applies both historical and projected future improvement, tapering at older ages, and is calibrated against published life expectancy figures. It is the same engine behind Seraph: Retirement Planner, our app for the money side of the same question.

Calculated on your device, from tables inside the app

Your answers are not written to your device, to iCloud or to your Health app

We do not collect your date of birth