Proofstay
EUOK
Time in Europe
18 days left
Schengen 90/180, counted the way the EU calculator does: entry and exit days count, Ireland and Cyprus don't. Shows your latest exit date.
UK, US, Canadian and Australian passports
Proof of where you were · Day by day · No account
They will ask where you were.
Have it proofed.
A residency audit, a Schengen border check, a health-card renewal: each one asks you to prove where you were, and for how long. Proofstay records every day on your iPhone, proofs it the moment it's recorded, and turns any period into evidence you can hand over.
Coming soon to the App Store
See what an auditor gets →
- Free to record, every rule
- No account, no server
- Stays on your iPhone
No accountNo tracking SDKsNo server holds your daysExport always free
What is Proofstay?
Proofstay is an iPhone app that proves where you were and for how long. It records the country, US state or Canadian province you are in each day, keeps every record in an append-only, hash-chained log so later changes show, and exports any period as a day-by-day evidence report with sources, photos and your signature. Because it has the days, it also counts them against the residency and visa rules that apply to you. Everything stays on the device, with optional backup to your own iCloud.
Who has to prove where they were
One record. Every question that ends in a letter.
The same proof answers different questions. Pick yours, and Proofstay also shows how close you are to the limit, and the date you need to know.
NYOK
Moved state
142 / 183 days
Days in the state you left, any part of a day counted, with planned trips included before you book. New York's statutory test is modelled exactly.
New York to Florida, California to Texas
UKOK
Left the UK
55 UK nights
Statutory Residence Test: midnights in the UK per tax year, your ties, and the most nights you can spend before you become resident.
British expats, people working abroad
CAWATCH
Snowbird
173 / 183 weighted
US Substantial Presence Test, the 182-day visitor guideline, and OHIP's 153 days in Ontario: three rules, one winter.
Canadians wintering in Florida or Arizona
WATCHNomad
158 / 183 in Portugal
Days per country this year, so the 183-day line never surprises you. A screening count: each country has its own rule.
Remote workers moving every few months
What makes it proof, not just a count
Recorded the day it happened. Proofed so it can't be quietly rewritten.
FreeAutomatic day log
An approximate location, about 1 km, when you open the app. Never continuous GPS, so your battery doesn't notice.
FreeYears back, from photos
The date and place of your photos rebuild past days in a minute. A small copy of one photo per day is kept for the report.
FreeProofed as it happens
Each entry carries the fingerprint of the one before. Change or delete anything and the chain breaks where it happened.
FreeEvery rule, every date
All rule cards with days used, days left and key dates. Days near a border are flagged for a one-tap answer.
PlusPlan before you book
Add a trip and see each rule's number before and after. Alerts at 14, 7 and 3 days before a limit.
PlusBorder mode
One clear screen for an officer: your entries and exits, days used, and the tickets behind them.
PlusIt was you, not just your phone
Face ID checks, random-day selfie checks you can take any time that day, and check-in photos with a precise location.
PlusTickets, tolls, receipts
Attach the paper trail to the day it belongs to. Each file is fingerprinted into the log.
PlusThe audit report
Any period, day by day, every source shown, photos as evidence, your signature on the last page.
PlusYour iCloud, timestamped
Backup to your private iCloud. Apple's servers timestamp each proof, outside your phone.
FreeNever locked in
CSV and the raw proofed log, any time, paid or not. Your days are yours.
FreeBuilt for battery
No background GPS, no polling, no trackers. One quick, low-power location fix at most once an hour.
How it works
Three steps. The second one you barely notice.
- 01
Tell it what you may need to prove
Time in Europe, a state you left, the UK, a snowbird winter, or every country. Add the facts a phone can't measure, like your UK ties. Then scan your photos: last year appears in a minute.
- 02
Live normally
Open the app now and then. Proofstay notes the country or state, flags days near a border, and proofs each entry the moment it's recorded. Planned trips show their effect before you book.
- 03
Proof and send
Pick a period, review the photos it picked for you, sign, and share a PDF with the log file. Anyone can recompute the fingerprints. No one needs to trust us.
What an auditor gets
We don't ask you to trust us. We ask them to check.
The report is built for the person on the other side of the desk: a summary per rule, how each day was recorded, every day near a border, a day-by-day table, photo evidence with time and place, and your signed declaration.
At the end, the proof record. Recompute the SHA-256 of the log file and it must match. Every entry's hash can be rebuilt from the one before. With iCloud backup, Apple's own server clock dates the last proof.
log head #872 · 2026-10-24T16:58:00Z 7ba3e91a40c2…f1d0b5bf log file proofstay-log-872.json SHA-256 f42384a1…6e2f rules Proofstay rules v2026.10 icloud #861 stored 2026-10-23T09:12Z (Apple)
Proofstay is a record-keeping tool, not tax or legal advice. Rules have parts a day count can't capture; your adviser decides how to use the report.
March 2028
A letter from New York State.
You moved to Florida in 2026. The auditor wants every day you spent in New York that year. More than 183, with a home there, makes you a resident, and the tax follows.
Without a record
Three weekends with bank statements, phone bills and old photos. Gaps you can't fill. Days counted against you because you can't show where you were.
With Proofstay
Open the app, pick 2026, Proof & create. Every day accounted for, the source of each one, the trips with tickets attached, signed and proofed. Done before your coffee cools.
Pricing
Free to record. Pay to prove.
A day not recorded can never be proved later, so recording is free, for every rule, forever.
Free
$0
- Automatic day log and photo history
- Every rule card, with key dates
- Proofed evidence log
- CSV and log export, always
Plus
$29.95/ year
or $20 for 6 months · $5 a month · 7 days free on 6 and 12 months
- Everything in Free
- Trip planner and limit alerts
- Border mode
- Face ID, selfie checks, check-ins, attachments
- Audit report for any period, signed
- iCloud backup with off-device timestamps
Free calculators
Check a number without the app
EUOpen →
Schengen 90/180 calculator
Days used and latest exit for any list of trips.
USSoon
Substantial Presence Test
Weighted days over three years, and days left.
UKSoon
UK residence test checker
Nights and ties against the HMRC tables.
NYSoon
State 183-day counter
Days in a state for the tax year.
FAQ
Questions people ask before an audit
Will a tax office or border officer accept the report?
Proofstay can't promise that; each authority weighs evidence its own way. What it gives you is what auditors ask for: day-by-day records made at the time, the source of each day, independent evidence like tickets and photos, and a log that shows any change. Ask your adviser how to submit it.
Does it drain my battery?
No. It takes one approximate location fix when you open the app, at most once an hour, and never runs continuous GPS. Photo history is read once, from photo metadata.
Can you see where I've been?
No. There is no account and no server holding your data. Your days stay on your iPhone, and in your own private iCloud if you turn on backup. Read the privacy policy.
What if I forget to open the app for a while?
Days without a record are shown as gaps, never guessed. You can fill them from photos, from tickets, or by hand, and the report shows which is which and when it was entered.
How does Proofstay count a day?
Any part of a day in a place counts for that place, as Schengen, US and most state rules require. The UK Statutory Residence Test counts midnights instead, and Proofstay counts it that way. Each rule's method is printed in the report.
What happens if I stop paying for Plus?
Recording, every rule card and export keep working. Only Plus features stop. Restoring from an iCloud backup works with or without Plus.
Is the Schengen count the same as the EU's?
Yes. It is tested against the European Commission's short-stay calculator, including entry and exit days and which countries are inside the area.
Is there an Android version?
Not yet. Proofstay is iPhone only for now.