BoatLog: Boat Maintenance Log

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About this app

BoatLog is an offline boat maintenance log that works the way boats actually age: by engine hours. Enter the service intervals from your own engine manual once, punch in the hour-meter reading after each outing, and BoatLog tells you what's coming due — per engine.

WHAT IT DOES

• Engine-hour due tracking — oil and filter, impeller, gear lube, fuel filters, spark plugs, each measured against the interval you set from your manual
• Independent hour clocks for twin and triple engines — the port impeller can be due while starboard still has hours left
• By-time items — annual service, winterization, anode and zinc checks
• Saltwater items — post-trip flush reminders for boats kept in salt
• Safety-gear expiry dates — flares and extinguishers, tracked from the dates you record
• Service records with photo receipts — date, engine hours, cost, shop or DIY, parts, up to 3 photos per entry
• Winterization checklist — an editable template you reuse each season, saved per boat per year
• Cost tracking — total spend, spend by system, and cost per engine hour, with per-currency totals
• Service-history PDF — the full log with photos, ready for a buyer or a marine surveyor
• CSV export and JSON backup with restore
• Works fully offline — no account, no sign-up

Every interval in BoatLog is one you enter from your engine manual, your mechanic, or your own judgment. BoatLog is a logger, not a mechanic — it never prescribes service.

WHO IT'S FOR

Outboard, inboard, sterndrive and pontoon owners; twin- and triple-engine offshore boats; sailboat auxiliary diesels; trailer boats that also need bearing and tire checks; and anyone who services their own rig and wants the history in one place instead of a drawer of receipts.

Questions or ideas? support@clearstackapps.com
Track boat service by engine hours — separate clocks for twins and triples.
Updated on
Aug 13, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • This app may share these data types with third parties
    App activity and Device or other IDs
  • This app may collect these data types
    App activity, App info and performance, and Device or other IDs
  • Data is encrypted in transit

What’s new

First release: engine-hour due tracking with independent clocks per engine, service records with photo receipts, winterization checklist, safety-gear expiry dates, cost per engine hour, PDF service history, CSV export and JSON backup. 10 languages.