Built at sea

A quiet logbook for mariners.

Portside is a personal log of the vessels you've sailed on, the ports you've visited, and the rank you held at the time. It works fully offline — because at sea you can't count on a signal.

Works offline No ads, no tracking Free forever Mariner Pro upgrade
Portside app screenshot
What's inside

Everything a working mariner needs. Nothing else.

Built as a personal log first — the features exist because I needed them at sea.

Vessel log

Every vessel grouped by sign-on session. Name, call sign, IMO, and rank held at the time — kept clean and separated.

Port history

Ports sorted by latest departure, with a clear SIGNED OFF marker on the port where each voyage ended.

Offline nautical maps

Download coastal regions you'll actually need. Charts render with no signal — coastline, ports, and seamarks only.

Optional cloud sync

Sign in and your log travels with you across devices. Don't want it? Use Portside fully offline forever — no account needed.

Export & import

Your data is yours. Export the whole log as JSON or CSV anytime. Import it back into a fresh install without losing a thing.

Light and dark

Follows your system appearance — cream by day, deep nautical blue by night. Everything re-themes quietly.

Mariner Pro

Routing, done right.

The most advanced A* routing algorithm you can hold in your pocket — completely offline. Plan a route between any two ports on Earth, close any canal or strait, and export to any ECDIS.

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Apps by Portside

Tools for the maritime world.

Portside is the flagship. These are the others — built with the same principles: offline-first, no accounts required, no nonsense.

On Google Play

Portside

Includes Mariner Pro upgrade — global routing, $14.99 once

A quiet, offline-first logbook for the vessels you've sailed on, the ports you've visited, and the rank you held at the time.

Bonded Stores
Internal Testing

Bonded Stores

Bonded store accounting built for the sea. Inventory, crew vouchers, representation accounts, and month-end close — fully offline.

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Sea Wages
Internal Testing

Sea Wages

A seafarer's wage tracker for contract-based earnings. Monthly rates, travel pay, allotments, MPO, and deductions — with automatic proration.

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LSA & FFE
Internal Testing

LSA & FFE

A complete, offline register for every life saving appliance and fire fighting item aboard. Service, renewal, and expiry dates — with at-a-glance status pills.

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Ready when you are.

Free to download. No ads, no tracking. Cloud sync is optional and only there if you want it.

Get it on Google Play

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