We couldn't find apps that respected our data. So we built them.

The problem we kept hitting

We live the flag-theory life — citizenship in one place, residency in another, work and play scattered across a map. That life runs on one unglamorous thing: counting days. Spend too long in the wrong country and you become tax-resident by accident — and if a tax authority ever asks about a year, it asks in days.

So we went looking for apps to track it. Every one we found wanted the same things: your location in the background, an account, a login, your data in someone's cloud “to sync”. For ordinary photos, maybe you shrug. For where you live and what you owe, you shouldn't have to.

So we built the app we wanted

Flags follows the same three rules everywhere:

• No GPS. Days are read from the date and coarse place-stamp your camera already wrote into your photos — on your device, using offline maps.
• No Flags cloud. We do not run a server for your travel data. Your record stays on your iPhone; any optional sync uses your own private iCloud.
• No login. No account, no email, no analytics SDK, not one line of tracking. Open the app, see your answer, carry on.

The app is Flags: Tax Residency Tracker. The Flag Strategy guide is where we write about the lifestyle it serves.

Who we are

Flags is built by travellers and operated as part of the ZeroCrew AI portfolio — ZeroCrew AI Ltd, a company registered in London, United Kingdom. We decided not to build a business where your data is the product. More people should pay attention to how, and with whom, they share the sensitive kind: residency, tax, and the days they spent in another country.

That's the whole pitch. Read the privacy page for the long version. The short version is: nothing leaves your iPhone.