Stay Vault Days tracks the days you spend in every country, checks them against official visa and tax residence rules, and warns you before you cross a line. No spreadsheets. No guessing. No nasty surprises from HMRC, the IRS, or border control.
Available on iOS, Android & macOS 7-day free trial
If you left the UK for Dubai, you probably think you can spend up to 183 days back in the UK without becoming tax resident again. That figure is everywhere — in blog posts, on forums, even from friends who "checked with their accountant."
It's wrong.
Under HMRC's Statutory Residence Test, a recent UK leaver with ties — a family home, a spouse, kids in school — can become UK tax resident again at as few as 16 days. Not 183. Not even close.
The difference between 16 and 183 is a six-figure tax bill.
Stay Vault Days doesn't guess. It models the real rules, sourced from the official government guidance, and tells you exactly where your personal limit sits.
You're tracking days in a spreadsheet that doesn't know the difference between a midnight and a transit day, doesn't model the deeming rule, and can't warn you when you're about to cross a threshold you didn't know existed.
You Googled "183 day rule UK" and got a confident answer from a blog that didn't mention ties, didn't mention the automatic overseas test, and wasn't written by a tax authority.
The EU Entry/Exit System went live in April 2026. Your Schengen days are no longer estimated — they're calculated, digitally, at every border. An overstay that used to slide now triggers an automatic flag.
Turn on GPS tracking and Stay Vault Days logs which country you're in, every day, automatically. Or import your travel history from your photos — we read the GPS data baked into your pictures and rebuild your timeline in seconds. Everything stays on your device.
Choose the visa or tax rules that matter to you — UK Statutory Residence Test, Schengen 90/180, US Substantial Presence, UAE treaty residency, and more. Each rule is sourced from official government guidance with a link to the original, so you can verify it yourself.
See exactly how many days you have left against each rule, get alerts before you approach a limit, and simulate future trips to check their impact before you book. If two rules conflict — like needing 183 days in the UAE while staying under 45 in the UK — we flag the collision.
Background location tracking logs your country every day — timezone-aware, battery-optimised, no manual input. Midnight-based counting for UK tax rules. Part-day counting for the UAE. Weighted multi-year counting for the US. The method matches the jurisdiction.
Forgot to turn on tracking six months ago? Smart Trip reads the GPS coordinates embedded in your camera roll and rebuilds your travel history automatically. It's smart enough to skip screenshots, WhatsApp saves, and web downloads — only real camera shots count.
Every threshold in the app links to the official government guidance that defines it — HMRC's RDR3, the European Commission's short-stay calculator, the IRS Substantial Presence Test, the UAE Federal Tax Authority. We summarise the rules in plain English, but the original is always one tap away.
The UK Statutory Residence Test isn't a single number — it depends on your ties, your work, and your prior residence. Answer four questions and Stay Vault Days calculates your real, personal UK day limit. Not a generic 183. Your number.
If you're building UAE treaty residency while limiting UK days, the two clocks are linked — more time in one means less in the other. The conflict detector models both thresholds together and warns you when your travel pattern puts either at risk.
Spain, Portugal, France, Italy, Switzerland — they all draw from the same 90-day pool. Stay Vault Days sums them automatically and shows you one number: days used, days remaining, and the rolling 180-day window. Matches the official EU calculator's logic exactly.
Before you book a flight, add a hypothetical trip in Plan Trip and see exactly how it affects every active counter. "If I spend 10 days in London in September, do I breach my ties limit?" Get the answer before you commit. Try it below →
Export your full travel history as a branded PDF — country breakdown, counter status, days per trip, official source citations. Designed to hand directly to your accountant, immigration adviser, or tax authority. Date-ranged or full history.
Tap a country to see your days, your limits, and the official rules. Watch the arcs trace your travel history. The Schengen pool counter floats live. Your UK limit glows amber when you're close.
This is real. This is in the app. Download Stay Vault Days →
Every chart is computed on your device — your travel history never leaves it.
Every threshold in Stay Vault Days is sourced from a primary government document — not a blog, not a forum post, not a summary that might be out of date. We show you exactly where the number comes from, when we last verified it, and what else can affect it.
If a rule changes — like the UAE's TRC process reform in January 2026, or the Schengen Entry/Exit System going live in April 2026 — we update the app and log the change so you can see what moved.
Every rule in the app has one of these behind it. Tap the source shield on any counter to see it.
Your vault, your counters, your world — clear enough to read in a taxi, precise enough to hand to your accountant.
Every feature included from day one. After your 7-day free trial, your subscription continues through the App Store unless you cancel.
