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 your
phone today.

Free to download and use, with an optional Unlimited upgrade. Plus a Windows desktop app 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.