# DayProof: 183 Days Residency — State & Country Tax Tracker

> State & Country Tax Tracker (iPhone/iPad app by 岚烜 吴.)

- Source: https://appshunter.io/ios/app/dayproof-183-days-residency/id6800396903 (this page in markdown: same URL + `.md`)
- Developer: [岚烜 吴](https://appshunter.io/developer/6788589687)
- Category: Finance, Travel
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 15 MB
- Languages: American English, Arabic, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French (France), German (Germany) and 24 more
- Released: 2026-09-08
- Data updated: 2026-09-08
- User reviews in markdown: https://appshunter.io/ios/app/dayproof-183-days-residency/id6800396903/reviews.md

## What is DayProof?

DayProof counts the days you spend in each place and tells you how close that puts you to being a tax resident there.

There is no single 183-day rule. That is the whole problem.

Maryland's line is "183 days or more." Massachusetts says "more than 183." Sit on exactly 183 and those two disagree about what you are. Portugal only counts a day you slept there, so your flight home is free. Britain decides at midnight, over a tax year that starts on 6 April, and Australia wants more than half the income year, which is 183 days most years and 184 after a leap day. Germany, France, Japan, Mexico and Turkiye have no day count in the law at all, whatever the internet tells you.

I read the statutes rather than the summaries, and DayProof carries each rule the way its own revenue department wrote it, with the source and the date I checked it printed underneath. Where a country has no number, it says so instead of making one up.

WHAT IT DOES

50 US states, the District of Columbia and 24 countries. Warnings reach you while you can still change your plans. The immigration clocks run alongside: US naturalisation, the substantial presence test, Canadian citizenship, the permanent resident obligation.

The audit export is PDF or CSV, day by day. Days you have no record for come out as gaps. An auditor looks for those first, and a document that quietly fills them in is worth nothing.

Automatic tracking fills the calendar from where your phone has been. It ships off.

35 languages.

PRIVACY

Everything stays on your phone. You never make an account, and nothing you record leaves the device.

FREE AND PRO

Free follows one place. Pro adds the rest: more places, automatic tracking, immigration mode, the audit export, and a home screen widget. Buy it monthly, yearly, or once for good.

Subscriptions renew automatically unless cancelled at least 24 hours before the period ends. Manage or cancel in your Apple Account settings after purchase.

Terms of Use (EULA)
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Privacy Policy
https://dayproof.wuyuxai.com/privacy

DayProof keeps records. It is not tax or legal advice. If a number in here is going to cost you money, have someone qualified in that country check it.

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| DayProof Pro Yearly | $29.99 | per year |
| DayProof Pro Monthly | $4.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| DayProof Pro Lifetime | $79.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-09-08

No release notes.

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All apps by 岚烜 吴: https://appshunter.io/developer/6788589687

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-08.*