For seafarers who do their own paperwork. Track every day at sea, every dollar earned, every expense in every port you visit.
Days, rate, expenses, currency, rotation — the fields that decide what you take home. Designed to open with one hand, in poor light, on a moving deck.
Open the app, tap once. Every rotation builds a record of where you were, what you ran, what you earned.
Live rates from Open Exchange. Convert at expense date or today — the math stays honest either way.
Every closed rotation archived with vessel, location, role, and totals. Export PDF for your records or HR.
Built for satellite gaps, port WiFi, dead zones. Everything saves locally and syncs when you surface.
Earnings to date, daily rate, projected total — see how the rotation tracks against your contract.
Multi-device sync, end-to-end encrypted. We hold the pipes; we never read what you write.
Three motions. Built around the rhythm of a rotation, not a productivity blog.
Vessel, role, start date, daily rate. The app starts counting — every day at sea logged from now until you sign off.
Dinner in port, SIM card in Singapore, taxi to the heliport. Any currency. The conversion happens later, with the right rate, automatically.
End date, final totals, PDF for your files. The rotation archives. The next one starts when you board again.
Captured live on iPhone — real rotation, real numbers. Drag to scroll.










The core log will always be free. Advanced features may move to a paid tier in the future — and when they do, we'll tell you exactly what they are before we charge for anything. No surprise.
Right now Seaman Log is free for everyone. Later, advanced features (multi-vessel manager accounts, accountant CSV exports, team rosters) may move to a paid tier. The core log — your days, rate, expenses, rotation — stays free for individual seafarers. We'll be specific about what's premium before any switch is flipped.
End-to-end encrypted sync. We hold ciphertext; only your devices hold the key. Nobody at Seaman Log can read your ledger.
One tap in settings. Account, history, sync state — purged in 30 seconds, no support email required.
Anything missing? support@seamanlog.com — answered by humans who have run a deck shift.
Free. Offline-first. No subscription. No ads.