Residency · Tax · Travel
Diego counts your days in every country, US state and city, and tells you before you cross a residency, tax or visa limit.
Built around the rules that decide where you're resident
US Substantial Presence Test
UK Statutory Residence Test
France tax residency
Switzerland 90-day rule
Canada sojourner rule
Puerto Rico Act 60
Malaysia 182 days
Cyprus 60-day rule
India 182 / 60 + 365
South Africa physical presence
Israel center of life
New Zealand 325-day ruleUS FEIE 330 days
US state & city residencyDiego is the day counter for people who live across borders. It turns your trips into the numbers tax offices and border guards actually count, and warns you before you cross a line.
Who it's for
Living across borders, a few months at a time. See every country's count at a glance and stay out of accidental tax residency.
Keeping a status, or leaving one behind. Track the 183-day rule, your home country and twelve national tests side by side.
Schengen's rolling 90/180 window counted for you, with the date your next day frees up. Free on every plan.
Left New York for Florida? Track statutory residency for the state and city you left, and your domicile, day by day.
Residency
Switch between rules and Diego recounts instantly. Pin the ones that matter to your Home screen.
Safe
58 days of safe stay left
Safe window
Every tracker shows how many safe days you have left and the date you'd cross. Alerts arrive as you get close, never after. Try it: these are Diego's own thresholds.
Add a trip in seconds, or let Diego log days in the background. Past years too.
Days or nights, country, state and city, recounted the moment anything changes.
A calendar with a flag on every day, and a timeline of every stay, year by year.
Hand your accountant a clean record: PDF, CSV or calendar file, on Nomad and above.
Count your days 3 ways
Turn on automatic counting and Diego notes which country, state and city you're in each day, using low-power location changes at about a kilometer's accuracy. No GPS trail, nothing leaves your phone.
Prefer to keep it manual? Log any trip with a country, optional US state and city, and dates. Diego recounts every rule instantly.
Add trips you haven't taken yet and switch on Include Upcoming Trips to see where next year's plans leave you, before you book.
The rules
Schengen 90/180
90
in any 180 days
Counts every Schengen day in the rolling 180-day window and shows the date your oldest day rolls off.
US Substantial Presence
183
weighted days
This year, plus a third of last year, plus a sixth of the year before. 183 weighted days makes you a US tax resident.
183-day rule
183
days a year
The common test for tax residency, country by country. Diego warns you from day 153.
Non-residency
183
days at home: stay under
Keeping non-resident status where you used to live. Diego warns you from day 120.
Statutory residency
183
days a year
State and city statutory residency, such as New York, with domicile tracked alongside.
Statutory Residence Test
183
days, or fewer with ties
Automatically resident at 183 days. Below that, residence depends on your UK ties against day bands.
Tax residency
183
days, foyer or economic center
Resident if France is your home, your main place of stay, or your center of economic interest.
90-day rule
90
continuous days, 30 if working
Tax residence after a continuous 90-day stay, much shorter than the 183-day norm.
Sojourner rule
183
days a year
183 days makes you a deemed resident. Residential ties can make you resident with fewer.
Act 60 presence
183
days on the island
The presence test, alongside the tax-home and closer-connection tests.
Residence status
182
days a year
Resident at 182 days. Linked-period rules can bridge short absences between stays.
183 & 60-day rule
60
days, with Cyprus ties
Two routes: 183 days, or 60 days when you are not tax-resident anywhere else.
Residence status
182
days, or 60 + 365
Resident at 182 days, or 60 days this year with 365 across the prior four.
Physical presence
91
days for six years
91 days this year and in each of the prior five, and 915 days over those five.
Center of life
183
days, or 30 + 425
183 days, or 30 this year with 425 over three years, plus a center-of-life test.
183 / 325-day rule
325
days away to leave
Resident after 183 days in any 12 months. Residence ends only after 325 days away.
FEIE physical presence
330
days outside the US
330 full days outside the US in any rolling 12 months to exclude foreign earned income.
Diego's results are estimates, not tax or legal advice. Most rules have exceptions and tie-breakers that a day count can't capture.
Free on every plan
Diego counts every Schengen day in the rolling 180-day window, and tells you the date your oldest day rolls off, so you know exactly when you can come back.
No accounts, no servers, no ads, no tracking. Your travel history stays on your iPhone, and the developer never sees it.
Diego notifies you two weeks before you'd cross a line, and pinned trackers turn amber as you get close: day 153 of 183, day 75 of Schengen's 90.
Pricing
Freeforever
Unlimited trip logging and the Schengen tracker, free forever.
$14.99/year$1.49/month
One visa or residency tracker for students, workers and wanderers.
$29.99/year$2.99/month
Several residencies at once, plus US state and city tax.
$59.99/year$5.99/month
No limits, for people with homes in many places.
Prices in US dollars; the App Store shows your local price. Subscriptions renew automatically unless canceled at least 24 hours before the period ends, and you can manage them in Settings. Changing plan never deletes your trips.
A tally of days isn't enough: each rule counts differently. Schengen uses a rolling 180-day window, the US Substantial Presence Test weights three years, US states and cities have their own statutory tests, and some countries look at continuous stays. Diego applies each rule to your trips and shows how many safe days you have left and the date you would cross.
Only if you turn on automatic counting. Diego then uses iOS's low-power significant-change and visit monitoring, at about a kilometer's accuracy, to work out which country, US state and city each day counts toward. It is off until you switch it on, and you can log every trip by hand instead.
iOS only tells an app about location changes in the background when it has Always access. Diego uses that to notice when you cross a border without you opening the app. It never runs continuous GPS.
No. Diego has no servers and no accounts. To turn coordinates into a place name it uses Apple's geocoder; the result is stored on your iPhone and nowhere else.
Yes. Add any past trip with its dates and Diego counts it toward every rule, including the US Substantial Presence Test, which looks back two years.
Yes. On Nomad and above you can export a PDF report, a CSV and a calendar (.ics) file. A plain-text summary is free on every plan.
Your choice. Days counts both the day you arrive and the day you leave; nights doesn't. Different rules and advisers use different conventions, so the switch is on every residency screen.
Yes. Add upcoming trips and switch on Include Upcoming Trips to see where your plans leave you before you book.
In the app, on your iPhone. If you back up your iPhone to iCloud or a computer, the backup includes Diego's data under your own settings. Deleting the app, or Reset App in Profile, removes it.
Your trips are never deleted. Moving to a smaller plan unpins trackers it can't hold; upgrade again and you can pin them back.
Not yet. Diego is for iPhone.
No. Diego gives estimates based on the trips you record and published day-count rules. Rules have exceptions and tie-breakers it can't capture, so check important decisions with a qualified professional.
Guides
How the Schengen Area's rolling 90-days-in-180 limit really works, why counting from your entry date gets it wrong, and how to know when your next day frees up.
Oct 6, 2026 Read →
Tax residencyWhy you can become a US tax resident without spending 183 days in the US in one year, and how the three-year weighted formula adds up.
Sep 22, 2026 Read →
Staying under 183 days is the best-known residency rule and the most misunderstood. Where it applies, where it doesn't, and what else tax authorities check.
Sep 8, 2026 Read →
Residency · Tax · Travel
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