Country Days Tracker: Geostay is an iPhone app I built to answer how many days are left under a visa or tax residency rule.
It has two parts. The first is the record: the app notes which country the iPhone is in each day, also while it is closed. The country comes from a map stored in the app, so there is no network call and it works in flight mode. Flights and points near a border are ignored, and your own edits take precedence over what the phone recorded. Older trips can be imported from the photo library, a Google Maps Timeline export, a Flighty export or a CSV file.
The second part is the counting. Each rule has its own counter because each rule counts differently: Schengen uses a rolling 180-day window, the UK test counts midnights in a tax year from 6 April, and the US test weights three years. There are visa rules for 40 countries and tax residency day tests for 184 countries, each shown with its source and the date it was checked. Geostay asks you a question only when the answer would change a count.
The travel history stays on the iPhone and there is no account.
ay.com
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