TL;DR — Key Takeaways
- →A sheet you control is a valid log when the year is short and you update it.
- →Rolling 90-in-180 math, year-crossover trips, and alerts are where sheets usually slip.
- →Two sources that disagree should raise a flag, not get overwritten.
- →Domicyle is the log plus those checks. It still depends on the dates you enter.
Short answer
Keep the spreadsheet if you have a handful of trips and you trust yourself to update it. Move to a tracker when the window rolls, the year crosses 1 January, or someone may ask which days a second source confirms.
Where a sheet usually stops
- Schengen days that fall out of a 180-day window on different dates
- A trip that starts in December and ends in January
- A calendar import and a typed row that name different countries
- A warning a week before 183 days, without you opening the file
Domicyle Residency Tracker stores the trips. Proof of Presence marks Verified only when two independent sources overlap, and alerts when they conflict. The free tier limits how many trips you can store.
Educational planning only — not tax advice.