BorderDays
Know your days before the border does.
One trip log, counted three ways: Schengen 90/180, the UK Statutory Residence Test and US substantial presence. Add a trip you're only thinking about and BorderDays tells you the exact date it would put you over.
Free. No card, no trial countdown, no paywall on the number that matters.
Also on your phone: iPhone — App Store ↗ Android — Google Play ↗
🇪🇺 Schengen 90/180
The rolling window done properly — entry and exit days both count, and days fall out as they age past 180. You get days used, days left, and the date a planned trip tips you over.
🇬🇧 UK SRT days
Midnights per tax year against your own sufficient-ties threshold. Whether your limit is 45, 90, 120 or 182 days depends on your ties — set them once and the counter uses your number.
🇺🇸 Substantial presence
The weighted 183-day formula — this year, plus a third of last year, plus a sixth of the one before. Checked continuously, not in April when it's too late to fix.
🏠 Home base
Tell it where you're tax resident and it counts the other way too: nights away from home this year, including the trips you've only planned.
📄 Evidence export
Every trip and every count in one CSV — the file your accountant actually asks for. Backfill years of history by uploading a spreadsheet.
🔒 No tracking
No GPS, no background location, no permissions. You type in your trips. The free calculators below never send your dates to a server at all.
Built for contractors, expats and anyone whose freedom has a day limit attached.