TL;DR — Key Takeaways
- →90 days in any 180-day period is a rolling window, not a calendar quarter.
- →A one-off tool forgets the trips when you close the tab.
- →A saved log is what you need if you add trips all year and want alerts.
- →Neither tool is the EU Entry/Exit System. Your log and the border record can disagree.
Short answer
Use a one-off Schengen calculator for a single check. Use a live tracker when the trips continue and you need the total to update.
The difference
| One-off calculator | Live tracker | |
|---|---|---|
| Input | Dates you type for this session | A stored trip history |
| After you leave | Nothing is saved | The next trip updates the same window |
| Alerts | No | Can warn before 90/180 or a tax-day threshold |
| What-if | Sometimes, for the dates on screen | Future trips tested against trips already logged |
Domicyle's free Schengen calculator is the one-off check, with no account. Premium Residency Tracker is the saved 90/180 log, tied to the same trip history as threshold alerts.
Educational planning only — not immigration advice.