What actually triggered my idea was a recent DNaaS HN post [1] that tells you your expected life expectancy and other cool facts based on your country and birthdate which I was reluctant to input my actual birthday.
Oh my god, this is scary. I don't want to live until the 2060s, lol. It terrifies me to think about how the world will be then...
But anyway, thanks for the link!
For the curious, this is their methodology:
> Remaining life expectancy at specific age (in days) was obtained by interpolating (spline) the 5 yearly/duration age-specific period life expectancies.
> Population.io uses official demographic data produced by the United Nations and published in the World Population Prospects
1. https://news.ycombinator.com/item?id=37324733&