# Seafarer Nautical AI - Toolkit > Nautical and Maritime Navigation Calculators, Notes, File Locker & AI chat Canonical page: [https://chrome-stats.com/d/com.lesra.seafarer](https://chrome-stats.com/d/com.lesra.seafarer) ## Overview - **ID:** `com.lesra.seafarer` - **Platform:** Android - **Type:** Android app - **Status:** Available - **Publisher:** Lesra Future Apps - **Category:** TOOLS - **Downloads:** 859 - **Version:** 3.3.1 - **Last updated:** 2026-05-21 - **First published:** 2026-01-04 - **Publisher country:** PH - **Size:** 36 MB - **Data as of:** 2026-09-10 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.lesra.seafarer) - **Website:** [https://jdronquillo16-dev.github.io/lesra-future-apps-policies/](https://jdronquillo16-dev.github.io/lesra-future-apps-policies/) - **Privacy policy:** [https://jdronquillo16-dev.github.io/lesra-future-apps-policies/](https://jdronquillo16-dev.github.io/lesra-future-apps-policies/) ## Description 🚒 Seafarer Nautical AI – Professional Maritime Toolkit (Offline)
Nautical and Maritime Navigation Calculators, Notes, File Locker & AI chat

Seafarer Nautical AI is a complete maritime and nautical productivity platform built by a working seafarer, for professional seafarer life at sea. It combines offline tools, verified calculators, and AI assistance into one reliable app designed for real onboard operations.

Whether you are a deck seafarer, marine engineer, or ETO, this maritime app gives you trusted nautical tools and calculators that work even without internet.

⭐ CORE FEATURES FOR EVERY SEAFARER
🧭 NAVIGATION TOOLS (10)

Professional nautical navigation utilities used by every seafarer onboard:
β€’ Digital Compass (gyro & magnetic reference)
β€’ Compass Observation Booklet (gyro/magnetic error)
β€’ Position Without GPS – 4 manual fixing methods
β€’ Anchorage Calculator – swinging circle & letting-go
β€’ ETA & Speed Calculator
β€’ Sunrise & Sunset Calculator (celestial-based)
β€’ Tide Height Forecast
β€’ Marine Weather Forecast
β€’ UN/LOCODE Port Finder
β€’ Live GPS information

All navigation calculators work offline and follow maritime standards.

βš™οΈ MARINE ENGINEER CALCULATORS (7)

Industry-verified calculators for maritime engineering:
β€’ Fuel Consumption Calculator
β€’ Lube Oil Consumption Calculator
β€’ Pump Capacity & Transfer Time
β€’ Compressor FAD Calculator
β€’ Heat Exchanger Duty Calculator
β€’ Shaft & Engine Power Calculator
β€’ Full Unit Converter

Every seafarer engineer relies on accurate calculatorsβ€”no spreadsheets required.

⚑ ELECTRICAL & ETO CALCULATORS (7)

Trusted nautical electrical calculators:
β€’ Ohm’s Law & Power
β€’ Single & Three-Phase Power
β€’ Voltage Drop Calculator
β€’ AWG ↔ mmΒ² Converter
β€’ Power Factor Correction
β€’ Resistor Color Code Tools
β€’ Energy Cost Calculator

Designed for maritime electricians and ETO seafarer roles.

πŸ€– MARITIME AI ASSISTANT

Built-in AI chat designed for maritime questions:
β€’ Maritime-focused AI responses
β€’ Voice input & output
β€’ Bring Your Own AI API key (ChatGPT / Claude / Gemini)
β€’ OpenRouter support
β€’ Usage-controlled and optional

This AI assistant helps every seafarer learn, verify, and solve onboard problems.

πŸ“‹ OFFLINE PRODUCTIVITY

Essential nautical tools for daily seafarer routines:
β€’ Routine Checklists
β€’ To-Do Lists
β€’ Offline Notes
β€’ Secure Photo & File Locker
β€’ Password protection
β€’ All data stored locally

Perfect for maritime work with poor or no internet.

πŸ’¬ SEAFARER COMMUNITY

β€’ Maritime discussion forum
β€’ Career & shipboard Q&A
β€’ Token rewards for helpful answers
β€’ Optional login

Learn from real seafarer experience in a professional maritime environment.

πŸ”’ PRIVACY & SECURITY

β€’ No tracking
β€’ No data selling
β€’ Local Hive storage
β€’ Firebase used only for community
β€’ Root detection prevents abuse

Built for nautical professionals who value security.

🎯 FREE & FAIR MONETIZATION

β€’ Core app is FREE
β€’ Earn tokens by watching ads
β€’ Roulette rewards after ads
β€’ No forced purchases
β€’ Premium unlocks for convenience

Every seafarer can access essential calculators without paying.

βœ… WHY SEAFARERS TRUST THIS APP

βœ” Built by an active seafarer
βœ” Works fully offline
βœ” Accurate maritime formulas
βœ” Lightweight and fast
βœ” Regular updates
βœ” Real nautical use cases

πŸŽ“ PERFECT FOR

β€’ Deck Officers
β€’ Marine Engineers
β€’ ETO / Electricians
β€’ Cadets & Students
β€’ Shore-based maritime staff

Download Seafarer Nautical AI today and carry your complete maritime toolkit, calculators, and AI assistant wherever your ship sails. ## Rankings - #1,202,795 β€” Overall ## Permissions and access ### Permissions - `android.permission.ACCESS_ADSERVICES_AD_ID` - `android.permission.ACCESS_ADSERVICES_ATTRIBUTION` - `android.permission.ACCESS_ADSERVICES_TOPICS` - `android.permission.ACCESS_COARSE_LOCATION` - `android.permission.ACCESS_FINE_LOCATION` - `android.permission.ACCESS_NETWORK_STATE` - `android.permission.CAMERA` - `android.permission.FOREGROUND_SERVICE` - `android.permission.INTERNET` - `android.permission.MODIFY_AUDIO_SETTINGS` - `android.permission.POST_NOTIFICATIONS` - `android.permission.READ_MEDIA_AUDIO` - `android.permission.READ_MEDIA_IMAGES` - `android.permission.READ_MEDIA_VIDEO` - `android.permission.RECORD_AUDIO` - `android.permission.VIBRATE` - `android.permission.WAKE_LOCK` - `com.android.vending.BILLING` - `com.android.vending.CHECK_LICENSE` - `com.google.android.c2dm.permission.RECEIVE` - `com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE` - `com.google.android.gms.permission.AD_ID` - `com.google.android.providers.gsf.permission.READ_GSERVICES` - `com.lesra.seafarer.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION` ## Similar extensions and apps - [MaritimeHub](https://chrome-stats.com/d/appinventor.ai_reida3rdmate2016.MaritimeHub) β€” 17,820 users - [Nautical Calculators Pro](https://chrome-stats.com/d/com.vucongthe.naucal) β€” 786 users - [Nautical Calculators](https://chrome-stats.com/d/com.vucongthe.naucal.plus) β€” 42,919 users, 3.38 / 5 - [SailNav – Nautical GPS Offline](https://chrome-stats.com/d/com.adelapena.sailnav) β€” 75 users - [CaptainCalc: Marine Navigator](https://chrome-stats.com/d/com.captaincalc.app) β€” 594 users - [Seafarers Universe](https://chrome-stats.com/d/com.seafarersuniverse) β€” 868 users - [Sailing Reference](https://chrome-stats.com/d/uk.co.shingler.sailingreference) β€” 695 users - [SEA - colreg, stability, etc..](https://chrome-stats.com/d/com.devd.SEA) β€” 1,784 users - [Sea AI – Ship Operations](https://chrome-stats.com/d/com.seaai.sea_ai) β€” 1,007 users - [Navigeitor](https://chrome-stats.com/d/com.mateof.navigeitor) β€” 64 users - [Sail Expert: Sailing App](https://chrome-stats.com/d/com.poterion.logbook) β€” 88,313 users, 4.24 / 5 - [EasySail](https://chrome-stats.com/d/com.geektheory.sailnavapp.navapp) β€” 1 users --- Source: [Chrome-Stats](https://chrome-stats.com/d/com.lesra.seafarer)