About this app
What OathDay does
The road to US citizenship is measured in days, and no calendar app counts them the way the naturalization rules do. OathDay is the private, fully offline travel log and day counter for green card holders on the multi-year path to filing Form N-400. The day math is unforgiving. You generally need 913 days of physical presence in the last five years, or 548 in three years if you are married to a US citizen. A single trip over 180 days can break continuous residence and reset years of progress. You can file up to 90 days before your anniversary date, but not 91. And the application asks for an exact list of every trip outside the United States lasting 24 hours or more, which is cross-checked against government entry and exit records. Many applicants reconstruct years of travel from passport stamps and records requests the week they want to file. OathDay replaces all of that with a habit that takes ten seconds: log the trip when you take it. The dashboard turns your travel history into the numbers that matter, counted the way the rules count them: days physically present, days abroad, your longest trip, continuous-residence status, and your earliest possible filing date, updated live with every entry. Planning a long visit home? The trip simulator shows how a planned trip would move your filing date and whether it approaches the 180-day line, before you book the ticket. When filing day arrives, export your complete trip history as a cleanly formatted table that mirrors the application's travel-history section, with dates out, dates back, destinations, and day counts, ready to transcribe or hand to your attorney. Expiry clocks keep your green card, passport, and re-entry permit renewal dates in view with gentle reminders, and family profiles let one device track every household member's countdown. Everything stays on your device. No account, no cloud, and no one else reading your travel history. OathDay is a personal record-keeping and reminder tool. It does not give legal advice and is not affiliated with USCIS or any government agency. • Ten-second trip logging with day math done the way the rules count it • Live physical-presence and continuous-residence counters • Earliest filing date, including the 90-day early-filing window • Trip simulator for planned travel • Formatted travel-history table export for filing day or your attorney • Green card, passport, and re-entry permit expiry reminders • Family profiles, fully offline, no account
Features
Built to be useful, not noisy.
Eligibility Dashboard
Hero day-ring showing physical-presence days counted vs required (913-of-1826 or 548-of-1096), continuous-residence status with longest-trip warning, and the earliest possible filing date including the 90-day early window — all recomputed live from the trip log.
Trip Log
Ten-second logging of every trip abroad: departure date, return date, destination, purpose. Day counts computed the way USCIS counts them (24h+ trips, partial days present), grouped by year with running totals that mirror the N-400 travel-history section.
Trip Simulator
Enter a planned trip and see the consequences before booking: how the filing date moves, how close the trip comes to the 180-day continuous-residence line, and whether the physical-presence budget still clears.
Travel Table Export
One tap renders the full trip history as a formatted PDF table matching the application's travel-history fields — date left, date returned, days out, countries visited — ready to transcribe into the form or hand to an attorney.
Document Expiry Clocks
Countdown cards for green card, passport, and re-entry permit expiry dates with configurable local-notification reminders, so a renewal never collides with a filing window.
Family Profiles
Track every household member's countdown on one device — each profile keeps its own trip log, rule basis (5-year or 3-year), documents, and filing date.
Why it exists
The problem
Naturalization requires USCIS day-math no calendar can do — 913 physical-presence days of 5 years (548 of 3 if married to a citizen), no single trip over 180 days, a 90-day early-filing window — plus an exact list of every 24h+ trip abroad for N-400 Part 9 that USCIS cross-checks against CBP records, where even one-da…
What's different
How OathDay stands out
Green Card Trips (the only real incumbent, 6 App Store ratings) gives away basic trip logging and day counting free but charges $9.99/mo, $44.99/yr, or $99.99 lifetime and still lacks the three things filing actually demands: an N-400 Part 9-style formatted travel-table export, document expiry clocks (green card, pass…
You might also like
All apps →
ClassProof
Productivity
Your own attendance record
DUI Road
Productivity
Every deadline back to driving
H1B Clock
Productivity
Recapture your H-1B days
Hourbook
Productivity
Track engine hours & service
Peshi
Productivity
Your case diary, every tareekh
SAR K9 Log
Productivity
Offline K9 training logbook
FAQ
Questions about OathDay
How much does OathDay cost?▾
OathDay is free. All features are included from day one — no subscription, no in-app purchases, no paid tiers. Everything you see in this listing works the moment you install it.
Where does OathDay store my data?▾
On your device. OathDay is built privacy-first: no account is required, no analytics SDKs, no third-party trackers. Nothing is uploaded to a server we control — the app works without one.
What platforms does OathDay support?▾
iOS, on iPhone and iPad. You can find the latest availability on this page.
How do I get support for OathDay?▾
Use the Support link on this page, or email support@allthingsn.com. We answer every message and keep responses on the same thread.
More in Productivity