DayLine automatically tracks which state you're in each day, counts your days against every state's real residency rules, and builds the audit-ready record that protects you.
Coming soon to the App Store for iPhoneCross a state's day threshold and you may owe them income tax on everything. DayLine exists so that never happens by accident — and so you can prove it if anyone asks.
Battery-friendly background tracking logs which state — or country — you're in every day. No check-ins, no forgetting.
183-day tests, 184-day tests, any-part-of-day vs. midnight counting, New York City's separate city-level test — DayLine counts your days the way each jurisdiction actually does.
Planning two weeks abroad in October? See how future trips change your year-end projection before you book.
Attach receipts, photos, and scanned documents to any day. When your ledger says Tennessee, the proof is right there with it.
One tap builds a PDF day log, CSV exports, and a complete accountant package — the record your CPA wishes every client had.
Already tracking with another app? Import your full history from any day-tracking app's export and keep your record unbroken.
DayLine has no servers, no accounts, no analytics, and no tracking SDKs. Your location, your days, and your documents are processed and stored on your iPhone — and nowhere else. We couldn't see your data if we wanted to. Read the full privacy policy.
Try everything free for 30 days. No credit card, and the trial never converts into a charge on its own.
Subscriptions are billed through Apple and can be cancelled anytime in your device settings.