The ship’s log,
made searchable.
Logline keeps the five records every boat actually needs — trips, engine hours, fuel, maintenance and documents — in one place that works with no signal, because that is where boats are.
A subscription, with no free tier — the annual plan starts with two free weeks.
- Account
- None
- Signal
- Optional
- Your data
- On device
This is the part other apps get wrong.
Every service interval runs on engine hours and calendar time at once, and comes due on whichever arrives first. A calendar-only reminder lies to the boat that ran hard all season. An hours-only reminder lies to the boat that sat on the mooring.
Both get told the truth. Overdue, due soon, on schedule — sorted by what needs doing next.
Engine oil & filter · 50 h / 1 yr
Out most weekends from May. The meter climbs faster than the calendar ever could.
On hours, in July — seven months before the calendar would have asked.
A handful of afternoons all summer. The oil aged anyway, because oil does.
On the calendar, in March — with 38 hours still left on the interval.
What it keeps
- 01
Trips
Start one with a tap, or let Logline notice you have left the dock and log it for you. Distance, duration, speed, crew and conditions are captured as you go. Add a note at anchor. Add a photo when something matters.
- Distance
- 31.2 nm
- Under way
- 4h 12m
- Aboard
- 4
- 02
Engine hours
A running hour log for every engine — single, twin or triple, plus the generator. A reading that goes backwards gets questioned rather than silently accepted, and replacing a gauge shifts every interval instead of quietly handing the engine free hours.
- Meter
- 112.4 h
- This season
- +38.9 h
- Engines
- 1
- 03
Fuel
Fill-ups with volume, price and place. Consumption per hour, per mile and per pound, in the units you actually use — US gallons, imperial gallons or litres.
- L / hr
- 24.6
- L / nm
- 3.1
- Cost / nm
- 4.80
- 04
Maintenance
Twelve tasks from the manufacturer's intervals, on a dual clock. Salt water halves the lubricant intervals, as the schedules specify. Service a task and it re-arms itself from the reading you entered.
- On the board
- 12
- Overdue
- 1
- Due soon
- 1
- 05
Documents
Registration, insurance, the survey, receipts. Scanned with the camera and read on device, kept behind the phone's passcode, sorted by what expires next — with a reminder a month before anything lapses.
- On device
- 4
- Expiring
- 1
- Uploaded
- 0
On the water
A logbook that is useful while you are still aboard.
The record is the point, and the record is written at the end. But a boat is not only a filing problem, and four things earn their place on the screen between leaving the dock and tying up again — none of which needs a signal to be useful.
- Ashore
The passage, on a map
Open a finished trip and the track is laid over the coastline you ran. It answers where was this — not can I go there, which is a chart's job and stays a chart's job. Recording never needs it: at sea the track draws on ruled paper, because that is the moment a tile server is not there.
- At anchor
An anchor watch
Drop the hook, set the swing, and the app watches the circle. It wants several fixes outside before it wakes you, so one wild reading below decks is not an alarm — and once it has gone off, swinging back inside does not silence it. A boat that dragged is a boat that dragged.
It cannot wake you if iOS has shut the app down overnight. A second pair of eyes, not a watchkeeper.
- Before you go
Tides, kept on the phone
Highs and lows for the nearest station, fetched a month at a time and cached, so the table still reads with no signal. The station list is bundled in the app, which is why the request carries a station number and never your position.
United States waters only — the source is NOAA. Elsewhere the screen says so rather than showing an empty day.
- Worth keeping
Marks
The anchorage with the good holding, the fuel dock that is open on a Sunday, the spot the fish were. Saved where you found them, and still there next season.
No account. No upload. No signal required.
Everything is stored on your iPhone or iPad. There is no server of ours to sign in to and nothing that reads your log and sends it anywhere. Every table exports to CSV and the whole record writes to a backup file, so it is never locked in — including after a subscription lapses. Turn on iCloud sync and it goes to your own iCloud account, which we cannot read either. The app talks to six things in total, and the privacy policy names every one.
- FullTrips, entries, photos and crewWritten to the phone as you make them
- FullFuel, hours and maintenanceEvery figure, and every due date computed from them
- FullDocumentsFiled on the device, behind the passcode
- FullReports, exports and the archiveGenerated here; sending one is a separate step
- FullThe anchor watchThe circle and the alarm are both on the phone
- GPSRecording a trip, and its trackA fix comes off satellites; none of it goes over a network
- SignalSending a float plan ashoreThe plan is written offline; delivering it is not
- SignalFetching a tide tableA month at a time, then cached — it reads offline after the first look
- SignalSearching for a dock by nameOr drop the pin by hand, which needs nothing
It is not a chartplotter.
It shows no charts, plots no courses and routes you nowhere. That market belongs to Navionics and Aqua Map, and it is not one Logline intends to fight badly.
It keeps the record, and it stays out of the way of whatever you navigate with. While a passage is recording, the track is a plain line on ruled ground and needs no tiles at all — because a tile comes off a server, and a server is exactly what is missing when a passage is worth logging.
Ashore, that same track can be laid over a map, which is a different thing from a chart and worth the distinction. A map shows land and answers where was this. A chart shows depths, buoys and lights and answers can I go there. Logline will answer the first and never the second.
A sterndrive is not an inboard, in any language.
Logline follows whatever iOS is set to, and every screen is translated — not only the buttons. The trade vocabulary was written by hand rather than run through a translator, because a translator turns sterndrive into inboard and puts two identical entries in the same engine picker. It is Z-Antrieb, embase Z, transmisión en Z, entrofuoribordo.
If a term reads wrong to you in your own language, write in. That is the correction worth having.
- English
- Deutsch
- Español
- Français
- Italiano
- Português
- Nederlands
- Svenska
- Norsk
- Dansk
- Suomi
- Polski
- Türkçe
- العربية
- हिन्दी
- 日本語
- 한국어
- 简体中文
- 繁體中文
- ไทย
- Tiếng Việt
- Indonesia
- Melayu
One subscription. No crippled free version.
A logbook with half the records in it is worse than no logbook, because you find out which half was missing at the survey. So there is one version of Logline and it does everything — trips, hours, fuel, the dual clock, documents, the PDF ship’s log and the maintenance record, with CSV of every table included.
Prices sit in the App Store, in your own currency, and they are the only place they live — which is why there is not a number on this page to go stale.
- Monthly
Billed each month. No trial — the free fortnight belongs to the annual plan, so that there is something to prefer it for.
- AnnualTwo weeks free
Starts with two weeks free. Both plans sit in the same App Store subscription group, so switching between them is Apple's job and only one is ever active.
You keep your logbook, and you can take it with you.
A lapsed subscription still opens the backup screen and writes the whole record to a file you keep. Six seasons of maintenance history is the exact document a surveyor asks for, and holding it behind an expired card is not something a boat log should do at any price.
Both prices are shown in the App Store before anything is charged.A season of honest records
becomes one document.
The ship’s log a buyer, a broker or an underwriter can trust — and the same history that answers an insurance question without a shoebox of receipts.
Requires iPhone or iPad on iOS 17 or later. Subscription required; the annual plan starts with two free weeks, and either cancels any time in the App Store.