Bosun's Mate is the vessel management system every mariner wishes they had.
Engine hours. Fuel logs. Parts catalogs. Receipts. Cruising notes. Everything that matters about your boat — captured beautifully, totalled automatically. Searchable. Cross-linked. Never lost.
WHY CAPTAINS LOVE IT
— Multi-engine support for twin and quad rigs. Track port, starboard, and beyond — each engine logged independently with its own service intervals, fuel economy, and hours.
— AI receipt OCR. Snap a photo of a parts receipt and Bosun's Mate reads every line item in 8 seconds. Vendor, OEM numbers, prices — extracted, organized, and added to your catalog. No more squinting at fading thermal paper.
— Multi-page survey extraction. Drop in a marine survey PDF and the AI pulls engine specs, hull data, electronics, and equipment into your vessel profile automatically. Saves hours of manual entry every time you buy a new boat.
— Per-engine fuel economy. See exactly which engine is burning more fuel at any RPM. Charts compare engines side-by-side at every cruise speed. Spot a lazy engine before it costs you thousands in repairs.
— Cruising log with photos. Document every trip with notes, weather, distance, and on-the-water photography. Build a permanent record of your adventures.
— Cost tracking that actually balances. Every receipt is logged with category, vendor, and date. Year-to-date costs always one tap away.
— Activity feed. Chronological view of every change — yours and your crew's. Like git history, but for your boat.
— Co-Captain shared access. Invite your spouse, captain, or trusted crew with read-only or full-edit permissions. Everyone looking at the same data.
— Offline-capable. Works on the water with no signal. Syncs the moment you're back at the dock.
— Photo attachments on every entry. Document parts, damage, repairs visually.
WHAT YOU CAN TRACK
— Maintenance (oil changes, service intervals, anode replacement)
— Fuel purchases and fuel-economy data points
— Parts catalogs (with OEM and aftermarket numbers, grouped by manufacturer)
— Zincs and consumables with replacement schedules
— Surveys, manuals, and reference documents
— Cruising logs with destinations, distances, and photos
— Custom categories you define yourself
PRIVACY FIRST
Sign in with Apple or email — your choice. We never sell your data, never track you across other apps, and never share with advertisers. Account deletion is one tap in Settings — your data is permanently removed within minutes.
SUBSCRIPTIONS
Bosun's Mate is free to download with a 7-day free trial of all features. After the trial, continue with an auto-renewable subscription:
— Bosun's Mate Pro Monthly — 1-month auto-renewing subscription
— Bosun's Mate Pro Annual — 1-year auto-renewing subscription
Payment is charged to your Apple ID at confirmation of purchase. Your subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple ID Account Settings > Subscriptions.
Terms of Use (EULA): https://bosunsmate.app/terms
Privacy Policy: https://bosunsmate.app/privacy
Built by mariners. For mariners.
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