Comparison

C vs NautNav

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

C

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.

Highlights
  • Free chart viewer
  • Autorouting
  • Personal waypoints
  • Track recording
  • Marine weather forecasts
  • Offline map downloads
  • High-resolution bathymetry
Features
Read full description

The C-MAP® App is the perfect companion for recreational boaters and water-lovers. Available on Mobile, Tablet or PC, you’ll always be able to access the most up to date C-MAP charts, wherever in the world you are. With full features, allowing you to explore, plan and save Points of Interest and Routes from wherever you are, the C-MAP App is the perfect aid to navigation for savvy boaters. The C-MAP App Includes: - FREE Chart Viewer - Autorouting™ – find the best route to your favourite places - Personal Waypoints - Track Recording - Thousands of pre-loaded Points of Interest - Marine Weather Forecast - Weather Along the Route - Weather Overlay - Chart Personalisation - Import & Export GPX Files – share your Routes, Tracks or Waypoints with friends - Measure Distance Tool Upgrade to Premium to unlock additional features, including: - Full GPS Functionality - Offline Map Downloads - REVEAL Shaded Relief - High-Resolution Bathymetry - Custom Depth Shading - AIS & C-MAP Traffic Try before you buy… Experience C-MAP App Premium for yourself, with a free 14-day trial (3-day trial in Denmark and Sweden). The C-MAP App updates on a continual basis, ensuring the latest, most up-to-date maps are always at your fingertips. Payment will be charged to iTunes Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal. Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. Links to Your Privacy Policy and Terms of Use. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable Privacy Policy: https://www.brunswick.com/dsar Terms of Service https://appchart.c-map.com/tos.html

About

NautNav

Features
Read full description

NautNav is the copilot that keeps you off the rocks. The "Waze of the sea" for sailors and powerboaters: from planning at the marina to arrival at your destination, with safety first. Here the unit of measure is the demonstrably valid route, not the pretty route. Every track runs through a safety system that rejects paths crossing land or shallow water before you cast off. GO OR NO-GO? Check wind, waves, swell, tide, visibility and temperature in real time and make the Go/No-Go call clearly. The day's conditions sit right on the home screen, next to the map. ROUTES THAT PROVE THEMSELVES Set origin and destination and get a route validated meter by meter. The Safety Kernel works with a coastline mask, bathymetry and real obstacles (dikes, breakwaters, piers) to keep your keel clear of the bottom. NAVIGATE AND RECORD WITHOUT THINKING In free navigation mode, your trip is recorded by GPS automatically and becomes a logbook. Speed, distance and time at sea, all logged. YOUR FLEET IN YOUR POCKET Register each vessel with cruising speed, top speed, tank capacity and fuel burn. Keep your boat's data at hand when it's time to plan. DIGITAL LOGBOOK Review every passage with map replay, distance covered and total time at sea. Your time aboard, organized. THE FLEET IS THE PROOF The more boats sail a region, the better the route gets. The community corroborates real paths and reports hazards, turning the experience of those who went before into intelligence for those about to go. OFFLINE MAPS Download entire regions and navigate without relying on signal. Coverage along the coast of Brazil and destinations like the Caribbean, Mediterranean, Portugal and the US East Coast. MADE BY SAILORS, FOR SAILORS Trilingual (Portuguese, English and Spanish). An interface built for precise reading under harsh sun, on your phone, at sea. PLANS • Marujo: free to start. • Capitão and Comandante: advanced features for those who take the boat seriously. Fair winds and calm seas. See you on the water.

Screenshots

C4 screens
NautNav4 screens

Verdict

The call

The clearest difference is update cadence: NautNav at every 5 days against C's every 6 weeks. C's advantage is chart position (#84 vs unranked). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. C sells 10 in-app purchases, starting at $1.99 per month and NautNav sells 4 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

C ships an update every 6 weeks, NautNav every 5 days. The most recent releases landed on September 29, 2026 and September 21, 2026 respectively.

Scorecard2 real differences · 9 level
C versus NautNav: the parameters behind the verdict, then further details
ParameterCNautNav
PriceFreeFree
Rating4.5 (2.3K ratings) — better—
Positive reviews51.0% of reviews—
Number of ratings2.3K — better—
Update frequencyEvery 6 weeksEvery 5 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
Best chart rank#84 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.1 — better15.6
Further details — not scored
Size169 MB40 MB
Age rating4+4+
DeveloperNavico Norway ASHEVI SERVICOS LTDA

Bugs and requests

C

Reported bugs

4 issues
  • App crashes when trying to save tracks or routes
  • Offline maps fail to download or disappear
  • Depth/contour data inaccurate or not displaying properly
  • Login and authentication issues preventing access

Requested features

4 requests
  • Add mast height/clearance feature
  • Improve AIS integration and functionality
  • Allow more customization of map views and data
  • Provide better customer support and communication

NautNav

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

C

Subscriptions10
  • Embark Advanced Weather$1.991 Month
  • Embark Offline Maps USA$2.491 Month
  • Annual Subscription14 Days trial$14.991 Year
Show 7 more
  • Annual subscription14 Days trial$14.991 Year
  • Region14 Days trial2 variants$18.991 Year
  • North America14 Days trial$23.491 Year
  • Maps Lakes South East USA14 Days trial$25.991 Year
  • Annual Subscription14 Days trial$29.991 Year
  • Caribbean14 Days trial$32.991 Year
  • Maps USA East Coast & Bahamas14 Days trial$39.991 Year
4 purchases

NautNav

Subscriptions4
  • NautNav Captain Monthly1 Month trial$9.991 Month
  • NautNav Commander Monthly1 Month trial$11.991 Month
  • NautNav Captain Annual1 Month trial$79.991 Year
Show 1 more
  • NautNav Commander Annual1 Month trial$99.991 Year

Questions

Is C free?
C is free to download, with in-app purchases available.
Is NautNav free?
NautNav is free to download, with in-app purchases available.
Do C or NautNav have ads?
Neither C nor NautNav shows ads.
Which is updated more often, C or NautNav?
C ships an update every 6 weeks, and NautNav every 5 days. Most recently, C was updated on September 29, 2026 and NautNav on September 21, 2026.

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