How much of your life is the glass taking? Challenge a friend with one link and see whose scroll costs more years.
The first screen-time calculator with a real friend-vs-friend challenge mode. Drag screen-time and social-media sliders and a live Life Race Timeline shows, in real time, how many years of your waking life the glass will eat. Tap "Challenge a friend" to generate a URL that carries your numbers — when a friend opens it on their device, your values appear as a locked ghost column while they drag their own, and a single-line verdict animates ("You burned 2.4 more years than Sana"). Includes Gloria Mark 2023 attention-residue toggle (+60% social-time tax for notification refocus), a Tim-Urban-inspired Life-in-Weeks heatmap with scrolled weeks in red, 12 "instead you could have" equivalents (novels read, marathons trained, languages learned, piano grades) randomized per reload, and a Recovery Simulator to see how many years come back if you cut an hour a day. Client-side only — URL carries all state, no backend.
Daily social-media hours × 365.25 × your remaining years, converted to waking-life-years (assuming 16 waking hours/day). Attention-residue toggle multiplies social time by 1.6× based on Gloria Mark 2023 research showing each notification costs ~23 minutes to refocus.
DataReportal 2024 Global Digital Report: average adult screen time 6h58m/day, social media 2h20m/day. These are the defaults when no custom values are entered.
Your numbers are URL-encoded into a short link like ?c=6.5,3.2,28,80 (screen, social, age, lifespan). When your friend opens it, their page reads those values, displays them as a locked ghost column, and lets them drag their own sliders to race. No server, no account — everything is in the URL.
No. Nothing is sent to any server. Challenge URLs are encoded and decoded entirely in your browser.
Social time is a subset of total screen time — the slider prevents setting social higher than total screen. We highlight social specifically because it is typically the most discretionary slice.
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