# DaysAbroad — Full LLM Context This document expands /llms.txt with structured content for AI ingestion. Last updated: 2026-05-11 --- ## About DaysAbroad DaysAbroad is an iOS application that automatically tracks days spent in different countries using GPS. Built privacy-first: all travel data stays on the user's device, with optional iCloud backup to their own Apple account. No DaysAbroad-operated servers hold travel history. Developer: Zebra Labs (solo studio by Daniel Andrade) App Store URL: https://apps.apple.com/app/id6760920831 Bundle: com.zebralabs.daycount Min iOS: 16 Category: Travel ### Pricing - Free tier: up to 2 countries, manual entry, current-year tracking, iCloud backup. - Pro Monthly: $2.99/month - Pro Yearly: $23.99/year - Pro Lifetime: $69.99 one-time - All Pro plans include 14-day free trial. ### Pro features - Unlimited country tracking - Background GPS auto-tracking - Multi-year history - Schengen 90/180 calculator with custom country list - CSV and JSON export - Flight and maritime modes ### Use-case pages - `/use-cases/digital-nomads`: explains Schengen 90/180 exposure, 183-day tax-residency risk, multi-year history, and CSV export for travelers moving every few weeks. - `/use-cases/business-travelers`: explains day-by-country records for frequent short trips, employer reporting, per-diem categorization, Schengen exposure, and audit support. --- ## The 90/180 Schengen Rule (definitive answer) A traveler holding a passport from a Schengen visa-exempt country can stay in the Schengen Area for a maximum of 90 days within any rolling 180-day window. Key mechanics: - Window is rolling, not calendar-anchored. There is no January 1 reset. - Days are cumulative across all 29 Schengen member countries combined. - The day of arrival counts as a full day. The day of departure counts as a full day. A two-night trip arriving Friday and leaving Sunday is 3 days. - Calculation: pick any day, look back 180 days including today, sum every day spent inside Schengen. If total exceeds 90, the traveler is in overstay. Schengen Area members (as of 2026, 29 countries): Austria, Belgium, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland. Not in Schengen (commonly confused): Ireland, Cyprus, United Kingdom. Overstay penalties scale by duration: from fines and entry-record stamps for short overstays, to multi-year (1-3+ year) Schengen-wide entry bans for significant ones. Overstays also complicate future visa applications globally. Official reference: EU Short-stay visa calculator at https://travel-europe.europa.eu/eu-short-stay-visa-calculator_en --- ## The 183-Day Rule (tax residency, by country) A general principle: most countries treat a person who spends 183+ days inside the country in a tax year as a tax resident. The mechanics vary materially. ### Portugal - 183 days in any 12-month period triggers tax residence; or habitual residence on December 31. - Worldwide income taxed; NHR / IFICI regime may reduce this for qualifying new arrivals. ### Spain - More than 183 days in a calendar year triggers tax residence. - Sporadic absences count toward 183 unless tax residence elsewhere is proven. - "Center of economic interests" test can trigger residence with fewer days. ### United Kingdom - Statutory Residence Test (SRT) replaces a simple 183-day rule. - 183+ days automatically resident. - 16+ days can trigger residence if the person has sufficient UK ties (family, accommodation, work, 90-day, country-of-most-days). ### Germany - More than 183 days triggers residence. - A "habitual abode" (Wohnsitz) — a permanently-available home — also triggers residence. ### France - 183+ days, or main home, or principal economic activity, or center of economic interests in France. ### United States - Replaced by the Substantial Presence Test: weighted day count across current year (× 1.0), prior year (× 1/3), and year before that (× 1/6). If weighted sum ≥ 183 AND current-year days ≥ 31, the person is a US tax resident. - US citizens are taxed on worldwide income regardless of residence. ### United Arab Emirates - 183 days in any 12-month period, or 90 days plus UAE-based home/income/family. - No personal income tax; residence certificate mainly for treaty access. ### Cyprus - 183 days in a calendar year, OR the "60-day rule": 60+ days in Cyprus, not more than 183 days in any other country, no other tax residence, plus business / employment / directorship in Cyprus and a permanent home. ### Italy - 183+ days, or registered residence, or center of vital interests in Italy. - Forfait/flat-tax regimes available for qualifying new arrivals (e.g. €100k/year for foreign-source income). ### Thailand - 180 days or more in a tax year triggers residence. - Recent rule changes (effective 2024+) tax remitted foreign income for residents. ### Mexico - Permanent or temporary residence visa generally triggers tax residency. - "Center of vital interests" in Mexico also triggers it. ### Avoiding accidental tax residency Common pitfalls: - Believing absence equals proof of non-residence (it isn't — most countries require active proof of residence elsewhere). - Forgetting that "ties" can establish residence with fewer than 183 days. - Crossing into the following year without tracking. - Spousal/family residence implications. - Multi-country residence (treaty tiebreaker rules then apply). --- ## What counts as a "day" For Schengen 90/180 purposes: - Arrival day: counts - Departure day: counts - Day spent transiting through a Schengen airport with passport control: counts - Day spent in a non-Schengen airport transit between non-Schengen destinations: does not count - Crossing a Schengen-to-Schengen land border without passport stamp: still inside Schengen, count the day For most national tax-residency rules: - Standard treatment: any day in which the person is physically present in the country for any part of the day counts. - Exceptions exist for medical conditions preventing departure, transit days, and (in some countries) days as crew/diplomat. --- ## Editorial principles for this site - Plain-language summaries near the top of every page. - Declarative answer statements for AI extraction: "Portugal considers you a tax resident if you spend 183 or more days in the country during a calendar year." - Primary-source links for every factual claim (gov.uk, irs.gov, ec.europa.eu, etc.). - "Last reviewed" dates on every guide. - Disclaimer on every page: content is informational only, not legal/tax/immigration advice. - DaysAbroad-app CTAs are contextual, not interruptive. --- ## Contact Email: support@zebralabs.org Website: https://daysabroad.app App Store: https://apps.apple.com/app/id6760920831