Start the download
Tap the download button on this page. The file is saved to your phone's Downloads folder.
Your boat remembers nothing. That has always been your job.
Photograph the plate on your engine. Purser reads the model and serial number, and finds them again with no signal.
Download the app
Free. Direct download. No account needed to start.
On a typical boat
Saildrive oilOverdueby 4 months
Saildrive anodeOverduesince last haul-out
Raw water impellerDuein 3 weeks
Most owners are behind on something and do not know it yet. Purser works out what, from the hours you enter.
See what yours looks like →
S/V TailwindNew equipment
Align the plate inside the frame
Check the details
MakeVolvo Penta
ModelD2-40
Serial5103978216
Output29.1 kW · 2800–3200 rpm
Save to equipment
The moment
The problem is rarely at the dock.
01
Anchored abroad. A pump fails. The serial number is on a plate behind a panel you cannot reach.
02
You bought that spare two years ago. It is on board. It is in one of fourteen lockers.
03
You are selling. The broker asks for service history and you have a shoebox of receipts in three currencies.
Record it once. Stop hunting for it.
01
Record it once
Photograph the maker's plate. The model, serial number and output are read from the photo and filled in for you — and the photo stays attached, so you never crawl back into the engine bay to read a number again.
Plates on boats are often dirty, dark or half hidden. Check what is read before you save it, and type anything it misses.
S/V Tailwind2014 Hanse 415
Main engine
Volvo Penta D2-40
Serial5103978216
Output29.1 kW · 2800–3200 rpm
Hours1,842 h
Added11 MAY 2024
Attached
Plate photo
Owner's manual · PDF
EQUIPMENTLOGSEARCHBOOK
02
Log as you go
Write one line when you change a filter, belt or impeller. It is faster than filing the receipt, and useful next season.
S/V Tailwind
New service entry
EquipmentMain engine · Volvo Penta D2-40
JobEngine oil & filter
Date14 AUG 2026
Hours1,842 h
PartVolvo Penta oil filter
Cost€68.40
NoteNext due at 1,942 h
Recent entries
02 MAY 2026Raw water impeller1,760 h
18 FEB 2026Primary fuel filter1,690 h
03 NOV 2025Alternator belt1,615 h
Save entry
03
Find it in seconds
Search by part, job or model. Find the right pump, the last invoice or the spare in locker fourteen. It works with zero signal.
S/V Tailwind
Offline — searching device
impellerClear
3 records found
Impeller kit · 09-1027B
Raw water pump · Johnson F5B-9
Locker 14 · Last invoice 02 May 2026
Raw water impeller
Service record · Main engine
Changed at 1,760 h
Impeller puller
Tools · Locker 3
Added 19 Sep 2024
Recent searches
fuel filter 8614778
saildrive anode
gas solenoid
bilge float switch
fuel lift pump
EQUIPMENTLOGSEARCHBOOK
Thirty miles offshore, the search still works.
Your records are stored on the device · They never leave it unless you switch on backup
How to install Purser
Four steps, under two minutes.
Open the file
Go to your file manager, open the Downloads folder and tap the file.
Allow the installation
Android will ask for permission. Tap Settings and allow installation from this source.
Open Purser
Open the app, photograph the plate on your engine, and your first record is done.
If your phone blocks the install
Go to Settings → Security (or Privacy) and enable Unknown sources, or Install unknown apps. On Samsung and Xiaomi this is set per app, so allow it for the browser or file manager you used. You can switch the permission off again once the install is finished.
What Purser does not do
There is nothing to hand over.
No account, no email, no password.
Your records, photos and scans stay on the phone — export or delete them at any time.
No access to your location.
The app collects anonymous usage stats (which features are used) to improve it — no personal data, no logbook contents, no photos.
Questions before you install? Write to hello@purser.app. A real person answers.
It knows when, not just how many hours.
Enter the hour meter now and then. Purser learns how much you actually run the engine and turns that into dates you can plan around.
- Dates, not just hour counts — plan around haul-out and the season.
- Every item on its own interval: hours, months or haul-outs.
- Works out your usage from the readings you have already entered.
You enter the hours; Purser does the counting from there. It does not read your engine.
Built offline first
At anchor there is no internet.
Your equipment, logs, photos and search all live on the phone. Cloud backup is optional, not required.
The Boat Book
A documented boat is a trusted boat.
Every job you log builds one continuous record of the vessel. When a broker, surveyor or buyer asks what has been done, you send a single PDF instead of a folder of receipts and a story you half remember.
It lists each piece of equipment with its serial number, every service with the date and engine hours at the time, and the invoices and photos attached to each job. The same record tells a surveyor what has been replaced and when — and tells you what is due next season.
- Equipment, models and serial numbers
- Service dates with engine hours, not just calendar dates
- Receipts, notes and photographs attached to each job
Built with owners testing it on their own boats.
Your next job will come. Have the answer before it does.
Download the appPurser is early, and it is built in the open.
Most of what is in the app is there because an owner asked for it. If something is missing for your boat, write to hello@purser.app.
Straight answers.
When is iOS coming?
Android came first because it can be shipped directly, without waiting on a review queue. iOS follows once the way records are structured stops changing — building both at once while the app is still moving means building neither properly. If you are on iPhone, write to hello@purser.app and you will be in the first test group.
How do I know the file is safe?
Download it only from this site — that is the only place it is published. The file is signed with the same certificate every time, so your phone will refuse any future update that did not come from us. Purser asks for no account and collects no personal data. It does send anonymous usage counts so I can see which features get used — never your records, your photos or your location. If anything about the download looks wrong, write to hello@purser.app before you continue.
Do I have to enter the engine hours myself?
Yes, and that is deliberate. Purser does not connect to your engine or your instruments — it works with no signal and no wiring, which is the whole point. You type the hour meter reading every few weeks, or whenever you log a job, and from then on Purser does the arithmetic: what is due, what is overdue, and roughly when each job will come round given how much you actually run the engine.
What does it cost?
Free to download and free to use for your equipment list, service log and offline search. A paid tier covers what goes beyond your own phone — exporting the full Boat Book as a PDF, cloud backup, sharing records with a co-owner or crew, and scheduled service summaries. You can get real use out of the app without ever paying, and nothing you have already recorded is locked away if you decide not to.
Does it really work with no signal?
Yes, and that is the whole point. Your equipment list, service logs, photographs and the search across them are stored on the phone itself, not fetched from a server. You can sit in a bay with no coverage, photograph a part, write the job and find last year's invoice. Cloud backup exists, but it is optional and it syncs when you next have signal. The app does send anonymous usage counts so I can see which features people actually use — never your records or photos.
Do I need an account?
No, not to use it. Install it and start recording your boat straight away — no email, no password, no verification, and your records stay on the phone. You only give an email if you want something sent to you: backups off the device, records shared with a co-owner or crew, or a service summary emailed to you on a schedule you choose — monthly, at haul-out, or before a survey. That is a setting you turn on, not a gate you pass through.
What happens to my records if this project disappears?
You can export everything at any time: the full log as CSV, the service history as PDF, and your photographs as ordinary image files in a folder. Nothing is locked in a format only this app can read. This is stated here because it is the first thing any sensible owner asks before typing three years of history into someone's software.