Backfill
Your whole career, caught up.
Just started logging? Don't retype years of contracts. Add a past vessel or voyage, tell it the dates, and Logbook estimates the sea days for you — then save-and-add-another straight into the next one.
Live on iOS & Android18 languages · Offline-firstNever lose a day of
Never lose a day of
sea time.
Log today's watch in two taps — or backfill years of past vessels and voyages in one sitting, with the sea days counted for you. Offline-first, kept off the cloud until you want it there. Free to download.
Backfill past vessels & voyagesFree up to 100 sea days18 languages for the world's crew
New in this release
Log forward — and backward.
The logbook now catches up on the years you already sailed, counts your career two ways, and lets you show the milestones. All free, all offline.
Career
Two numbers, counted apart.
Sea days for the ticket, days aboard for the contract — tracked separately, the way the MCA and your captain actually count them. Milestones tick over at 25, 50, 75, 100%, with an on-pace projection for your next ticket.
Share
Milestones worth showing.
Hit a number you're proud of? Tap share and Logbook builds a clean card — your sea days, your nautical miles — straight to your phone's share sheet. Send it to the crew group, mark the moment. Your data, your call.
What it does
Three jobs, done properly.
Logbook stays out of the way on watch and earns its keep at appraisal time. No habit-loop, no streaks, no nagging.
Watches
Stand it, log it.
A watch is two taps. Start time, end time, role. Edit later if the day overran — nothing's locked the moment you save.
Voyages
Port to port.
Vessel, GT/kW, dates, distance. Filter the way an officer actually remembers a career: by ship, by season, by rotation.
Certificates
Tickets that ping you first.
Every ticket in one place with expiry reminders that fire well before the deadline catches you. Metadata only — no scans, no leaks.
Your language
Reads in your language, counts in the MCA's.
The sea is crewed by the world, and around 44% of seafarers don't work in their first language. So Logbook now speaks 18 languages — switched instantly, offline, no signal needed — so the crew who don't log in English don't have to. The maritime terms, the PDF and your emails stay in English, because that's what a flag state reads.
English · Français · Español · Italiano · Português · Русский · Українська · Ελληνικά · Hrvatski · Română · Bahasa Indonesia · Türkçe · Polski · Deutsch · Nederlands · 中文 · العربية · Filipino
A look around
Four screens, that's the app.
Logbook is one tab per job. Home, Logbook, Career, Certificates. No menus to dig through, nothing to subscribe to.
Built where it's used
Bridgedeck started because nothing on the App Store understood a watchkeeper's day.Logbooks were forms. Study apps were quiz decks. So we built the tools we wished we'd had on watch — and shipped them.
By a Seafarer. · Independent & self-funded
FAQ
Things people actually ask.
What counts as a sea day?
Any 24-hour period in which you stood a watch. Logbook counts the way the MCA counts — if you signed off a watch that day, it's a sea day.
What happens after 100 days if I don't upgrade?
Everything you've logged stays in the app and stays exportable. New watches stop saving until you upgrade or export. We don't hold your career hostage.
Is my data really off the cloud?
Until you flip sync on, yes — the database lives in your phone's app sandbox. Sync, when enabled, uses our Supabase instance in Frankfurt with row-level security and no third-party analytics.
Does the PDF pass a flag-state audit?
It mirrors the MCA / PYA Sea Service Testimonial layout for the fields v1 captures. Master sign-off lives in v2. For now, treat the PDF as evidence, not as a substitute for the signed paper.
Can I add sea time from before I installed the app?
Yes — log a past vessel or voyage, give it the dates, and Logbook back-calculates the sea days for you. Save-and-add-another until your whole history's in.
Can I use it in my language?
Eighteen languages, switched instantly and offline — because around 44% of seafarers don't work in their first language. The maritime terms, the PDF and your emails stay in English, because that's what a flag state reads.
The bridge between
your sea time and your ticket.
Study and Logbook are both live on the App Store. Open either to get started.