TL;DR — Key Takeaways
- →A generic calculator is the right tool for one itinerary and no account.
- →Domicyle's free Schengen calculator is in that same category.
- →Premium adds a stored log, threshold alerts, and an audit PDF.
- →None of these sync to the EU Entry/Exit System.
Short answer
Generic Schengen calculators and Domicyle's free calculator do the same first job: 90 days in 180 for the dates you type. The Premium log is a different product: the dates stay, and later trips update the same window.
When each is enough
- One trip, no history — any correct 90/180 calculator, including Domicyle's free tool.
- Trips all year, plus a warning before the window fills — Residency Tracker and alerts.
- A file for an accountant — the Residency Audit Pack export from that same tracker.
See also one-off calculator vs a live tracker.
Educational planning only — not immigration advice.