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Best Sea Map Apps

235+ iOS apps curated and reviewed

3.6 avg rating
20 free apps
Updated September 2026

C is the household name in sea map, but it's far from the only option. We track 235+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Compare top Sea Map Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1C-MAP: BoatingC-MAP: BoatingFree4.5★ (2.3K)NoYesSep 2026
2Navionics® BoatingNavionics® BoatingFree2.9★ (2.3K)NoYesSep 2026
3i-Boating: Marine Charts & Gpsi-Boating: Marine Charts & GpsFree4.5★ (15K)NoYesSep 2026
4Aqua Map BoatingAqua Map BoatingFree4.7★ (14K)NoYesSep 2026
5Open Sea OpenSeaMap BrowserOpen Sea OpenSeaMap BrowserFree3.2★ (5)NoNoMay 2026
6Sea MapsSea MapsFree—NoYesAug 2026
7MahendrasMahendrasFree—NoNoSep 2026
8Mapitare Terrain and Sea mapMapitare Terrain and Sea mapFree—NoYesAug 2026

Top Picks for Sea Map

C-MAP: Boating#1

C-MAP: Boating by Navico Norway AS

Charts, Planning & Navigation
Editor's Choice
🗺️ Navigation
4.5😞(2.3K ratings)
FreeIn-App Purchases
#77in Navigation
C-MAP: Boating screenshot 1
C-MAP: Boating screenshot 2
C-MAP: Boating screenshot 3
C-MAP: Boating screenshot 4
C-MAP: Boating screenshot 5
C-MAP: Boating screenshot 6

Access up-to-date nautical charts for global exploration and planning. Save points of interest and routes, record tracks, and view marine weather. Upgrade for offline maps, GPS, and advanced features like shaded relief and AIS.

What We Love

  • 🚀 Accurate maps and charts
  • 👍 Easy to use and intuitive
  • 📍 Helpful for planning trips and routes
  • 🛳️ Useful for both professionals and beginners
  • ⚙️ Detailed features like shaded relief and weather info

Room to Improve

  • 🐛 Frequent crashes and freezes
  • ⚠️ Unreliable GPS tracking and location updates
  • 🔌 Offline maps and features not working as expected
  • 🤔 Confusing or missing functionality (e.g. route editing)
  • 💸 Expensive subscription, not worth the cost
Navionics® Boating#2

Navionics® Boating by Garmin

Nautical and fishing charts
Strong Contender
🗺️ Navigation
2.9😞(2.3K ratings)
FreeIn-App Purchases
#4in Navigation
Navionics® Boating screenshot 1
Navionics® Boating screenshot 2
Navionics® Boating screenshot 3
Navionics® Boating screenshot 4
Navionics® Boating screenshot 5
Navionics® Boating screenshot 6

Access detailed nautical charts and advanced boating features offline on your mobile device. Plan trips with dock-to-dock guidance, check weather and tides, and connect with a community of boaters. Ideal for cruising, fishing, sailing, and diving.

What We Love

  • 🚀 Great navigation app
  • 🗺️ Detailed charts and maps
  • ⚓ Useful for boating and sailing
  • 💰 Good value for money

Room to Improve

  • 🐛 Frequent crashes and bugs
  • 🔒 Login issues and unreliable offline access
  • 💰 Expensive subscription model
  • 🗺️ Inaccurate or outdated map data
i-Boating: Marine Charts & Gps#3

i-Boating: Marine Charts & Gps by Bist LLC

Lake Depth Map,Sailing Plotter
Worth Considering
🗺️ Navigation
4.5😊(15K ratings)
FreeIn-App Purchases
#78in Navigation
i-Boating: Marine Charts & Gps screenshot 1
i-Boating: Marine Charts & Gps screenshot 2
i-Boating: Marine Charts & Gps screenshot 3
i-Boating: Marine Charts & Gps screenshot 4
i-Boating: Marine Charts & Gps screenshot 5
i-Boating: Marine Charts & Gps screenshot 6

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.

What We Love

  • 🚀 Accurate GPS and navigation
  • 🗺️ Detailed nautical charts
  • 📊 Helpful fishing and structure information
  • 🔍 Useful for finding unexplored fishing spots
  • 💻 Offline functionality works well

Room to Improve

  • 🌐 GPS/location issues, inaccurate positioning
  • 💰 Expensive recurring subscription model
  • 🔁 Difficulty restoring purchased content on new devices
  • 🔧 Poor customer support and lack of response
  • 📦 Missing coverage for some lakes/waterways

More Sea Map apps to explore

FAQ about Sea Map

What are the best sea map apps for iPhone?
C-MAP: Boating tops our sea map apps ranking as of September 2026, with a 4.5-star average from 2.3K App Store ratings, and it's free to download.
Yes — 20 of the top sea map apps we rank are free to download, including C-MAP: Boating and Navionics® Boating.
C-MAP: Boating has no ads and offers in-app purchases, according to its App Store listing as of September 2026.
We track 235+ sea map apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
The app provides up-to-date nautical charts for global exploration and planning. It allows users to save points of interest and routes, record tracks, and view marine weather forecasts. Premium features include offline map downloads, full GPS functionality, shaded relief, and AIS.
Key features include a free chart viewer, Autorouting for finding the best routes, personal waypoints, track recording, thousands of points of interest, marine weather forecasts, and chart personalization. Premium users gain access to offline map downloads, GPS functionality, REVEAL Shaded Relief, high-resolution bathymetry, and AIS.

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