Evening Screen Exposure
How late-evening screen use relates to sleep onset, and which of brightness, duration and distance actually moves the figure.
Evening screen exposure scoring 32 delays sleep onset by about 11 minutes and costs 77 minutes of sleep a week, and the biggest single lever is distance rather than brightness.
Evening Screen Exposure
Frequently asked
Is the Evening Screen Exposure free?
Yes. Every tool on AlphaBetaMinds is free, needs no account and has no usage limit.
Does this tool store what I type?
No. It runs entirely in your browser. Your inputs are never sent to our server, and nothing is logged.
How accurate is it?
It uses the McCrindle generation boundaries (Gen Alpha 2010–2024, Gen Beta 2025–2039) and UN World Population Prospects vital rates. Sources and formulas are on our methodology page.
Can I use the result in an article or report?
Yes, with a credit and a link back to this page. See our terms of use for the full licence.
More screen time & digital life
Autoplay Cost Estimator
How much of daily viewing was chosen, and how much was just the…
Childhood Digital Footprint Estimator
How many photos, videos and posts exist of a child before they can…
Screen Guilt Reality Check
Compare what you feel about your household screen time with what the numbers…
Social Media Age Laws by Country
Every country with a law, bill or official plan setting a minimum age…
Which Apps Check Age in the UK? Online Safety Act Table
How Reddit, X, Discord, TikTok, Snapchat, YouTube, Roblox, Instagram and others check age…
What Changes After Cutting Screens
A realistic timeline of what families report after a sustained reduction.
AI Chatbot Age Limits
How old a child must be to use ChatGPT, Gemini, Meta AI, Snapchat…
Notification-Free Hours
Which hours to make notification-free, and what that actually returns in focused time.