Lab notes · 2026-09-12

How the receipts are calculated

The exact arithmetic behind the Doomscroll Receipt and the Subscription Lifetime Receipt, so you can check it, argue with it, or reuse it.

Both receipts are deliberately dumb. No models, no predictions, no personalisation. One input, multiplied out. This page shows every step so nobody has to trust us.

Doomscroll Receipt

Subscription Lifetime Receipt

What is not calculated

Nothing about health, attention, addiction or wellbeing. The receipts only convert one unit into another (hours into days, months into decades) because the second unit is the one people remember. What you do with the number is yours.

Reuse

The pages are plain HTML and JavaScript, MIT licensed, in the public repository. You can also embed either receipt on your own site.

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