Best Nautical Dictionary Apps

164+ iOS apps curated and reviewed

4.5 avg rating
16 free apps
Updated July 2026

Nautical dictionary is the household name in nautical dictionary, but it's far from the only option. We track 164+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Compare top Nautical Dictionary Apps (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Nautical dictionaryNautical dictionaryFreeNoYesMay 2026
2Dictionary of Nautical TermsDictionary of Nautical Terms$0.99NoNoJul 2026
3Merriam-Webster DictionaryMerriam-Webster DictionaryFree4.8★ (324K)YesYesAug 2026
4Dictionary Offline - Dict BoxDictionary Offline - Dict BoxFree4.6★ (12K)YesYesAug 2026
5Advanced English Dictionary.Advanced English Dictionary.$2.994.7★ (241)NoNoAug 2026
6i-Boating: Marine Charts & Gpsi-Boating: Marine Charts & GpsFree4.5★ (15K)NoYesAug 2026
7Maritime Terms & DictionaryMaritime Terms & DictionaryFreeYesYesMay 2026
8Advanced Dictionary&ThesaurusAdvanced Dictionary&ThesaurusFree4.7★ (4.6K)NoYesAug 2026

Top Picks for Nautical Dictionary

Merriam-Webster Dictionary#3

Merriam-Webster Dictionary by Merriam-Webster, Inc.

Worth Considering
🔍 Reference
4.8😊(324K ratings)
FreeAdsIn-App Purchases
#36in Reference
Merriam-Webster Dictionary screenshot 1
Merriam-Webster Dictionary screenshot 2
Merriam-Webster Dictionary screenshot 3
Merriam-Webster Dictionary screenshot 4

Access America's most respected dictionary, updated with new words and meanings. This app offers offline access, voice search, daily vocabulary challenges, and a thesaurus. It's designed for English language reference, education, and vocabulary enhancement.

What We Love

  • 🚀 Easy to use
  • 👍 Comprehensive definitions
  • 👍 Helpful thesaurus
  • 🚀 Offline access

Room to Improve

  • 🐛 Ads can be intrusive
  • 🐛 Difficulty closing ads
  • 🐛 Repetitive game questions

More Nautical Dictionary apps to explore

4
Dictionary Offline - Dict Box
Dictionary Offline - Dict Box
Dictionary Offline - Dict Box
Dictionary for All Languages
Free

This app provides an offline dictionary and translator for over 50 languages. It offers smart word suggestions, text translation in other apps, offline pronunciation, and a picture dictionary. An optional premium upgrade unlocks advanced features and an ad-free experience.

Offline dictionary & translator50+ languages supportedSmart word suggestions
🔍 Reference
(12K)
free with in-app purchases
5
Advanced English Dictionary.
Advanced English Dictionary.
Advanced English Dictionary.
English Dictionary & Thesaurus
$2.99

This comprehensive English dictionary and thesaurus offers offline access to millions of words, definitions, pronunciations, and etymologies. Explore word connections, sample sentences, and discover new vocabulary with advanced search and unique features.

Extensive word database (4.9 million words)High-quality audio pronunciations (US, UK, AU)Advanced search technology
🔍 Reference
(241)
paid
6
i-Boating: Marine Charts & Gps
i-Boating: Marine Charts & Gps
i-Boating: Marine Charts & Gps
Lake Maps & Fishing Spots
Free

Navigate waterways with detailed marine charts and GPS. Features include route planning, voice-guided navigation, tide and current predictions, and track recording. Offers extensive map coverage for various regions and inland rivers.

Detailed vector marine chartsRoute planning and editingVoice-guided navigation
🗺️ Navigation
(15K)
free with in-app purchases
7
Maritime Terms & Dictionary
Maritime Terms & Dictionary
Maritime Terms & Dictionary
Maritime dictionary offline.
Free
🔍 Reference
(0)
8
Advanced Dictionary&Thesaurus
Advanced Dictionary&Thesaurus
Advanced Dictionary&Thesaurus
English dictionary with Audio
Free

This comprehensive English dictionary and thesaurus offers precise definitions, synonyms, antonyms, and related words. It features intelligent search tools, offline audio, and customizable themes to enhance your language learning experience.

140,000+ definitionsSynonyms, antonyms, and related wordsOffline audio pronunciation
🔍 Reference
(4.6K)
free with in-app purchases
9
Dictionary Linguee
Dictionary Linguee
Dictionary Linguee
German, French, Spanish, more
Free

Access reliable translations for multiple languages, including French, Spanish, and German, with this comprehensive dictionary app. It offers fast, offline access to a vast database compiled by lexicographers and includes example sentences and audio pronunciations.

Translations in French, Spanish, German, and moreCompiled by over 400 lexicographersFast translations with quick search
🔍 Reference
(11K)
free
10
iNavX: Marine Navigation
iNavX: Marine Navigation
iNavX: Marine Navigation
Sailing & Boating Chartplotter
Free

This app provides comprehensive marine navigation tools, including worldwide chart coverage, weather forecasts, and AIS integration. It allows users to plan routes, track their position, and connect with onboard instruments for a complete boating experience.

Worldwide marine chart accessReal-time GPS plottingWaypoint and route management
🗺️ Navigation
(21K)
free with in-app purchases
11
Pleco Chinese Dictionary
Pleco Chinese Dictionary
Pleco Chinese Dictionary
Handwriting, OCR, flashcards
Free

This app is a comprehensive tool for learning Chinese, offering integrated dictionaries, document reading, and flashcard features. It supports various input methods including handwriting and OCR, with extensive dictionary options and pronunciation guides.

Integrated dictionaries with over 110,000 entriesFull-screen handwriting inputLive OCR for word lookup
🔍 Reference
(1.9K)
free with in-app purchases
12
LDOCE (InApp)
LDOCE (InApp)
LDOCE (InApp)
Longman Dictionary of English
Free

This comprehensive English learner's dictionary offers over 230,000 words and meanings, with integrated thesaurus and collocations. It provides clear definitions, real-world examples, and pronunciation files to enhance fluency and vocabulary.

230,000+ words, phrases, and meaningsIntegrated Thesaurus and Collocations Dictionary165,000+ real-world example sentences
🔍 Reference
(1.2K)
free with in-app purchases
13
Concise English Dictionary
Concise English Dictionary
Concise English Dictionary
English Dictionary & Thesaurus
$0.99

Explore a vast English dictionary and thesaurus with detailed definitions, pronunciations, and word origins. Access over 591,700 entries and 4.9 million words, with offline capabilities and a user-friendly interface for enhanced language learning.

Comprehensive dictionary databaseHigh-quality audio pronunciationsExtensive IPA pronunciation guides
🔍 Reference
(30)
paid
14
Maritime Dictionary Offline
Maritime Dictionary Offline
Maritime Dictionary Offline
Complete Maritime Dictionary
Free

Access a comprehensive offline dictionary of maritime terms and vocabulary. Easily search, bookmark, and manage your maritime learning with thousands of entries available without an internet connection.

Offline access to all dataThousands of maritime termsSearch functionality
📚 Books
(2)
free
15
TZ iBoat – Marine Navigation
TZ iBoat – Marine Navigation
TZ iBoat – Marine Navigation
Boat GPS, Charts, AIS, Tides
Free

Navigate the seas with advanced marine charts, GPS, and AIS data, even offline. This app offers detailed bathymetry, community-contributed map data, and dynamic features for safe boating, sailing, and fishing.

Offline marine chartsGPS and route planningAIS Online tracking
🗺️ Navigation
(857)
free with in-app purchases
16
ActiveCaptain®
ActiveCaptain®
ActiveCaptain®
Connect to Your GPS Plotter
Free

This app connects your mobile device to compatible Garmin chartplotters, enabling wireless chart and map transfers, software updates, and route planning. It also provides access to a community of boaters for reviews and information on marinas and points of interest.

Wireless chart and map transferRoute and waypoint planningActiveCaptain Community for POI reviews
🗺️ Navigation
(5K)
free with in-app purchases
17
WordBook (Universal)
WordBook (Universal)
WordBook (Universal)
English Dictionary & Thesaurus
$2.99

This comprehensive English dictionary and thesaurus offers extensive definitions, word origins, and pronunciation guides. It includes a built-in spell checker, bookmarking, and advanced search capabilities for word puzzles.

Professionally recorded pronunciationsWord origin information (Etymologies)Built-in spell checker
🔍 Reference
(271)
paid
18
Orca: Boat GPS, Charts, Routes
Orca: Boat GPS, Charts, Routes
Orca: Boat GPS, Charts, Routes
GPS Chart Route Sail Powerboat
Free

Navigate the waters with advanced marine charts, intelligent route planning, and real-time weather and vessel tracking. This app offers offline chart access and can integrate with hardware for a comprehensive boating experience.

Marine chartsIntelligent routingLive AIS tracking
🗺️ Navigation
(352)
free with in-app purchases
19
Nautical Rules
Nautical Rules
Nautical Rules
Master the Rules of the Road
Free

Master USCG Navigation Rules with a comprehensive question bank and smart study features. Track your progress, practice for exams, and study offline to navigate with confidence.

1,200+ practice questionsInland and International waters coverageDetailed explanations
🗺️ Navigation
(4)
free
20
Dictionary - Word Search Lex
Dictionary - Word Search Lex
Dictionary - Word Search Lex
Dictionary for normal Language
Free

Access a professional multilingual dictionary for English, Japanese, and Korean. Get detailed definitions, pronunciations, and example sentences. Save your search history and favorites for offline language learning.

Multilingual definitionsPronunciations and examplesAuto-save history
🔧 Utilities
(1)
ad-supported

FAQ about Nautical Dictionary

Are there free nautical dictionary apps for iPhone?
Yes — 16 of the top nautical dictionary apps we rank are free to download, including Nautical dictionary and Merriam-Webster Dictionary.
Nautical dictionary has no ads and offers in-app purchases, according to its App Store listing as of July 2026.
We track 164+ nautical dictionary apps on the iOS App Store as of July 2026, ranked by rating, recency, and analysis of real user reviews.