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. Works fully offline — because at sea you can't count on a signal.
Get it on Google PlayBuilt as a personal log first — every feature exists because I needed it at sea.
Every vessel grouped by sign-on session. Name, call sign, IMO, and rank held at the time — kept clean and separated.
Ports sorted by latest departure, with a clear SIGNED OFF marker on the port where each voyage ended.
Download coastal regions you'll actually need. Charts render with no signal — coastline, ports, and seamarks only.
Sign in and your log travels with you across devices. Don't want it? Use Portside fully offline forever — no account needed.
Your data is yours. Export the whole log as JSON or CSV anytime. Import it back into a fresh install without losing a thing.
Follows your system appearance — cream by day, deep nautical blue by night. Everything re-themes quietly.
The most advanced A* routing algorithm you can hold in your pocket — completely offline. Plan a route between any two ports on Earth. Every canal and strait a toggle. One-tap planning, export to any ECDIS.
What is A* routing algorithm?The engine runs the A* routing algorithm over a global graph covering nearly every charted harbour on Earth — every major trade lane, canal, strait, and coastal approach. Port-to-port distances match published sailing distances to within 1-2% on every major route.
Suez. Panama. Malacca. Sunda. Bab-el-Mandeb. Bosporus. Danish Straits. Magellan. Gibraltar. 80+ more. Close any passage and the router genuinely goes around.
Tap a seaport on the map, hit START ROUTE. Pan to the destination, tap END ROUTE. The route builds in the background, gets saved, and drops onto the map with the camera already fit to it.
Long-press any waypoint to pick it up. Drag with your finger — a magnifier loupe follows so you can see the channel under your thumb. Rename any waypoint for reference.
Distance, ETA at any speed, waypoint-by-waypoint breakdown, DMM coordinates. Everything a watchkeeper needs before standing watch.
RTZ (IEC 61174), GPX, KML, CSV, RUX (Furuno), RTM (Raymarine). Every exporter produces a file that opens on the other end.
No cloud requirement. The routing graph and port database ship with the app. Route planning works at sea, in a harbor, or with the phone in airplane mode.
NAVAREAs with IMO colors. Load Line Zones. GMDSS HF DSC coast stations. NAVTEX, MARPOL, ECA, ATBA, war risk zones. Every layer toggleable, every layer labeled.
Watch A* explore the water, discard the dead ends, and settle on the shortest safe passage.
| Feature | Logbook (Free) | Mariner Pro |
|---|---|---|
| Map + navigation | Yes | Yes |
| Logbook + port call tracking | Yes | Yes |
| Port lookup (97,000+ ports) | Yes | Yes |
| Vessel register (607,000+ vessels) | Yes | Yes |
| Marine overlays | Limited | All layers |
| A* Route Planner | - | Yes |
| Canal / strait closures | - | Yes |
| Route editor | - | Yes |
| Passage Plans | - | Yes |
| Import / Export ECDIS | - | RTZ + 6 more |
| Two-tap route building | - | Yes |
| Offline routing | - | Yes |
No. $14.99 once. No recurring charges. No account required for the routing features.
No. The routing graph, port database, and all overlays are bundled in the app. Routing works offline.
Yes. Export to RTZ (standard for ECDIS), GPX, KML, CSV, and vendor formats RUX (Furuno) and RTM (Raymarine).
No. Portside is a planning and logbook tool. It is not a navigation system and must never be the sole means of navigation. All routes are advisory and must be verified against official charts before use.
OpenStreetMap and OpenSeaMap for the base map. Regulatory overlays sourced from IMO, IHO, and national authorities.
14 days, no questions asked. Google Play auto-refunds within 48 hours; after that, email [email protected] and we'll process the refund directly.
Learn how to log vessels, add port calls, sign on and off, and download offline maps — step by step, in five minutes.
How to use Portside