KnotWise — Sailing Logbook

The professional ship's logbook for bluewater sailors. Offline-first. No cloud required. NMEA-ready — maintenance, inventory & crew in one app.

KnotWise is the digital ship's logbook for experienced bluewater sailors — offline-first, built for serious passage-making, with optional multi-device sync.

FULLY OFFLINE KnotWise runs entirely without an internet connection. At sea, at anchor, in a marina with no signal — your logbook is always available. No forced cloud sync. No account required to get started. Your data stays on your device.

NMEA LIVE INTEGRATION Connect KnotWise directly to your onboard instruments. GPS position, wind speed, heading, depth and log — all flow automatically into your log entries. Enter once. Use three times: logbook record, passage statistics and customs document from a single source.

PROFESSIONAL PDF EXPORT Generate print-ready documents directly from your log data:

• Ship's logbook (A4, fully formatted)
• Customs declaration
• Crew list for port entry
• Ship dossier

COMPLETE VESSEL MANAGEMENT KnotWise covers the full lifecycle of a passage — and everything between them:

• Logbook & passage log — every voyage documented without gaps
• Maintenance board — tasks, intervals and service history at a glance
• Inventory & stowage plan — always know what's aboard and where
• Crew management — crew members, documents and emergency contacts in one place
• Offline vector charts — your track drawn automatically from log entries
• 16 navigation calculators — tides, waypoints, fuel, provisions and more

OPTIONAL SYNC Keep KnotWise in sync across your iPad, Mac and PC. Sync is fully optional — the app works completely standalone without it. Offline availability is never compromised.

FREE TO START Download KnotWise and start logging immediately — no account, no credit card, no restrictions on local data. Sync and extended features are available as optional upgrades.

Built by sailors. For sailors who know what they're doing.

Terms of Use (EULA): https://knotwise.app/terms/ - Privacy Policy: https://knotwise.app/privacy/