Tools
Calculators that talk in years,
not notifications
Everything here runs entirely in your browser. No uploads, no accounts, nothing stored. Type, look at the number, close the tab.
Screen-time calculator
Hours per day → years of your remaining life, share of waking time, and what the same hours could buy instead.
Open →Phone habit test
A 12-question self-check, scored in four bands, with a concrete next step for each.
Open →