Built for seafarers · 100% on-device · v3.1.5

Your whole maritime
career.
Offline, in your pocket.

Every certificate, sea-service record and personal detail in one secure place on your phone — no cloud, no account, no sign-up. Smart expiry alerts, a one-tap PDF CV, and a vCard QR code that crewing agencies can scan in seconds.

100% Offline No Account Expiry Alerts PDF CV Generator vCard QR Sea Time Tracker DP Log UK MPC
🔔WAH expires in 45 days
📄CV ready — 1 tap
SDM Web on desktop — Maritime CV designer with live PDF preview
SDM on iPhone — Documents screen with expiry tracking
Deck & Engine Officers
🛟 Offshore & DP Crews
🔒 No Account. No Cloud.
📡 Works Fully Offline
📱 iOS · Android
Why SDM

The 3 headaches every
seafarer knows too well

SDM was built around the real frustrations of life at sea — not around a feature list.

A certificate expired right before sign-on

One lapsed STCW or medical certificate and you can't join the vessel — a missed contract and weeks of lost income.

Colour-coded expiry badges and push notifications warn you 90, then 60 days before each document expires.
📂
Rebuilding your CV for every crewing agency

Re-typing vessels, ranks, dates and certificate numbers into a fresh Word document each time a manning agent asks.

A professional maritime PDF résumé generated from your data in one tap — four ready-made designs to choose from.
📡
Documents scattered across phone, email & paper

Scans buried in chats, photos lost in the gallery, originals in a folder back home — never there when an inspector asks.

Everything in one place on your device, available 100% offline — no internet, no account, no subscription to use.
Features

Everything a seafarer
carries, in one app

A complete personal organiser — documents, sea time, CV, contacts and scans — plus optional DP Log and UK Midnight Position Check modules.

📁
Documents

Store certificates, licences, passport and visas with issue/expiry dates. Attach a PDF scan to each, search and filter instantly.

8 categories · expiry badges · PDF attachments
Sea Service

A voyage log for every contract. Total sea time and STCW revalidation service are calculated automatically from your sign-on / sign-off dates.

Auto sea-time · revalidation badge · active voyage
📄
CV / PDF

Generate a professional maritime résumé from your data and share it anywhere. Pick from Classic, Executive, Minimal or Offshore designs.

4 designs · one-tap share · sea-service & docs tables
QR Code

A vCard QR code anyone can scan with their camera to instantly save your contact, email, Telegram, WhatsApp and Teams — your home address stays private.

Instant contact · messenger deep links · no address
🖻
Scans

Capture documents with the camera into compact single-page PDFs, review them in a built-in viewer, then bundle and share a selection as one ZIP.

Camera → PDF · built-in viewer · Archive & Send
👤
Personal Info

Photo, full name, nationality, applied position, contacts, visas and career preferences — the foundation of your CV and QR code.

Contacts · visas · career preferences · biometrics
🎓
Education

Institution, degree, specialisation and graduation year, plus languages, English level and additional technical skills — all shown on your CV.

Degrees · languages · ECDIS & tech skills
👥
Next of Kin & Notes

Keep your emergency contact and free-text remarks. Toggle notes to append a cover-letter paragraph to the bottom of your generated CV.

Emergency contact · CV remarks · cover letter
🧭
DP Log · optional

For Dynamic Positioning officers: track Active and Passive DP hours across 48 half-hour slots per day and export a monthly DP Time record as PDF.

48 slots/day · auto totals · PDF DP time record
🏴
MPC · optional · beta

UK Midnight Position Check: auto-records your GPS position at midnight London time and checks the 12 nm territorial-waters zone for NI evidence.

Auto midnight record · 12 nm zone · monthly PDF
💾
Backup & Restore

Export everything to a single .sdm file you control — store it in iCloud, Google Drive or email, and restore it on a new device in seconds.

.sdm export/import · device transfer · legacy .json
🌐
Languages & Themes

Multi-language interface with a dark mode tuned for night watches, quick search across every screen, and a tidy on-device file archive.

Dark mode · multi-language · quick search
Free & Unlimited

Start free.
Upgrade when you're ready.

Explore the whole app on the free tier. Unlock unlimited documents, the full CV and device backups with a single Unlimited purchase.

Free
No account · no card · forever
  • Up to 5 documents with expiry alerts
  • Sea Service voyage log & sea-time
  • QR vCard, Scans & Personal Info
  • CV shows document names only
  • Next of Kin: name only on CV
  • No backup export / import
Best value
Unlimited
Monthly subscription or one-time Lifetime
  • Unlimited documents
  • Full CV PDF with all numbers & dates
  • Full Next of Kin details on CV
  • Export & import .sdm backups
  • All future premium features
  • Everything in the Free tier
Monthly — auto-renews each month Lifetime — one payment, never expires
Built for the job

Made around real
maritime workflows

Every feature maps to something seafarers actually do — revalidation, inspections, crewing and life on board.

STCW Revalidation
Sea-time counted for you

Toggle the R badge on any voyage and SDM tallies the qualifying service in months and days against the STCW 12-month revalidation rule.

Expiry Control
Never miss a renewal

Red under 60 days, yellow at 60–90, green beyond — with push notifications so a lapsed certificate never costs you a contract.

Crewing & Interviews
CV & QR ready in seconds

Hand a manning agent a polished PDF résumé or let them scan your vCard QR — your full profile saved to their phone instantly.

DP Operations
DP time on record

Log Active and Passive DP hours per half-hour slot and export a clean monthly DP Time record for your logbook and DP certification.

UK NI Evidence
Midnight Position Check

Auto-record your position at midnight London time and prove you were outside the 12 nm UK zone — exported as a monthly PDF report.

Privacy by Design
Your data stays on device

No account, no server, no tracking. Everything lives on your phone; backups are a file only you control. Works fully offline at sea.

Document Types

Every certificate.
Every category.

Organise all your maritime paperwork into clear categories — each with issue and expiry tracking and an attached PDF scan.

Identity
🛂 Passport
📘 Seaman's Book
🌍 Visas
🪪 National Endorsements
Competency & Training
🎖 Certificate of Competency (COC)
📜 Certificate of Proficiency (COP)
🛟 STCW Certificates
🎓 Diplomas
📑 Training Certificates
Medical & Offshore
🩺 Medical Certificates
💉 Vaccination
⚙ Offshore Certifications
📂 Other Documents

Expiry badge colours: red under 60 days · yellow 60–90 days · green beyond 90 days. PDFs up to 3 MB per document.

8
Document categories with expiry tracking
4
Professional CV résumé designs
2
Optional modules — DP Log & UK MPC
100%
Offline — no cloud, no server
0
Accounts or sign-ups required
Download

Get SDM on
every device.

Free to download and use, with an optional Unlimited upgrade. Plus desktop apps for Windows and macOS, and free web tools for seafarers.

Get Started Today

Ready to manage
your career?

Download SDM free — no account, no card. Keep every document, voyage and certificate in your pocket and never miss a renewal again.