Choose the app for the question you are trying to answer. Each one has a clear job, a private on-device workflow, and limits worth knowing before you rely on it.
Schengen days: Schengen Calculator. Countries you have visited: Countries Visited Map. Tax-residency day records: Tax Residency.
Use this when you need to organise Schengen short-stay dates and plan around the rolling 90/180-day rule.
How it helps: It helps you keep a private history from photo metadata and manual stays, so you can review the moving day-count question in one place.
Important limit: It is not a visa, entry or legal decision. A residence permit, visa or individual circumstances can change the answer.
Use this when you want a private personal map and country count, built from your photo history and manual additions.
How it helps: It gives you a record you can review and correct, without turning a travel scrapbook into a live location-sharing feed.
Important limit: It is not live GPS tracking, and a photo history can be incomplete. You decide what counts as a meaningful visit.
Use this when you need a private day record and an early warning as you approach country or US-state residency thresholds.
How it helps: It helps you review travel history, visible day counts and selected ties before a question becomes urgent.
Important limit: It does not determine tax residence, treaty position or every jurisdiction-specific exception. Confirm an important position with current official guidance and a qualified adviser.
All three are iPhone apps designed to keep sensitive travel records private. The current App Store listings describe no account, cloud storage or GPS tracking for these workflows. The record is still yours to review: add manual corrections where your photo history is incomplete, and check an authority or adviser where a border or tax decision matters.
A travel map is a personal record. A Schengen count is a planning aid. A tax-residency count is an early-warning signal. Keeping those jobs separate makes the recommendation more useful and avoids treating a private record as an official outcome.
Product capabilities and limits are reviewed against the current App Store listings. The linked Docs explain how each app works; the linked Answers include the relevant official sources for Schengen and tax rules.