C vs OceanFishMap
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Free chart viewer
- Autorouting
- Personal waypoints
- Track recording
- Marine weather forecasts
- Offline map downloads
- High-resolution bathymetry
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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
OceanFishMap
This app provides fishing boats with oceanographic data and expert recommendations to optimize fishing operations. It allows users to record and share catch information, view vessel positions on a map, and send emergency messages.
- Oceanographic data updates
- Expert fishing recommendations
- Offline data viewing
- Vessel position on map
- Catch reporting and sharing
- Emergency messaging
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OceanBytes provides fishing boats Oceanographic data including fishing recommendations created by expert Oceanographers that helps the boats save time and fuel. The app also allows the boats to record and share catch information in addition to the ability to send SOS and emergency messages. With OceanBytes you can: Get daily updates of Sea Surface Temperature, Plankton, Sea Surface Height Anomaly and Surface Currents. Get updated Fishing Recommendations twice a week. Download and View the data offline. See your vessel position on the map to find good fishing locations near you. View course and distance to a location from your vessel. Create fish catch reports for different species and share it. Send different types of emergency messages. Make your fishing operations more efficient with OceanBytes. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is rating: OceanFishMap at 5.0 against C's 4.5. OceanFishMap also leads on update cadence (fortnightly vs every 6 weeks) and iOS requirement (13.4 vs 15.1). C's advantage is ratings volume (2.3K vs 1) and chart position (#102 vs unranked). On price, ads, in-app purchases and monetization model 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
Both are free to download. C sells 10 in-app purchases, starting at $1.99 per month and OceanFishMap sells 4 in-app purchases, starting at $100.00 per month. Whichever you choose, the download price is not the number that matters.
OceanFishMap holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: C has 2.3K ratings behind it against 1, so its average is the more settled of the two.
C ships an update every 6 weeks, OceanFishMap fortnightly. The most recent releases landed on September 26, 2026 and September 8, 2026 respectively.
| Parameter | C | OceanFishMap |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (2.3K ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 51.0% of reviews | — |
| Number of ratings | 2.3K — better | 1 |
| Update frequency | Every 6 weeks | Fortnightly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | #102 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 13.4 — better |
| Further details — not scored | ||
| Size | 169 MB | 90 MB |
| Age rating | 4+ | 4+ |
| Developer | Navico Norway AS | OceanBytes Holding LLC |
Customer experience
C
OceanFishMap
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
OceanFishMap
Not enough reviews yet to summarise bugs or requests.
In-app purchases
C
- Embark Advanced Weather$1.991 Month
- Embark Offline Maps USA$2.491 Month
- Annual Subscription14 Days trial$14.991 Year
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- 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
OceanFishMap
- Coastal7 Days trial$100.001 Month
- Coastal + AIS$149.001 Month
- Pro7 Days trial$200.001 Month
Show 1 moreShow fewer
- Pro + AIS$249.001 Month









