The answer to "how many GB?" is already on your phone. iPhone: Settings > Screen Time. Android: Settings > Digital Wellbeing. Both show how many minutes a day you spend in each kind of app. Put those minutes in below and we will do the rest.
iPhone: Settings > Screen Time > See All App & Website Activity > Week tab, "Categories" section. Android: Settings > Digital Wellbeing & parental controls > Dashboard. If you would rather not look them up, start from one of the presets below and adjust.
Quanti dati userai?
Una stima basata su medie, con un margine di sicurezza del 20% già incluso.
How the estimate works
Each kind of usage has a fairly stable hourly cost on a phone screen: video streaming ~700 MB/h, social feeds ~350 MB/h, video calls ~450 MB/h, music ~100 MB/h, browsing ~60 MB/h, messaging ~15 MB/h, navigation ~5 MB/h. We multiply your minutes by those rates.
- We subtract the share of the day you spend on Wi-Fi - data used at the hotel or a café never touches your plan.
- We add ~50 MB a day of background traffic that flows even when you do nothing.
- If photo backup is on we add ~250 MB a day; on its own, that single item drains most plans.
- We add a 20% safety margin: travel usage runs higher than usage at home, and running dry mid-trip is the expensive kind of mistake.
The result is based on averages. High-resolution video, large app updates or constant tethering can multiply consumption. If in doubt, take the next size up - or start small and top up along the way.