C vs Loisto Mariner
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
Loisto Mariner
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Loisto Mariner is the best companion to boater: tools for navigation, weather forecast and identifying of other boats with Automatic Identification System (AIS) are always in your pocket! Navigate easily with the Finnish nautical map or hike with the precise topographical maps. Loisto Mariner takes you where ever you want to get: • Find your destination with the advanced location search provided by the National Land Survey of Finland. • Enjoy boating also on the lake area – the nautical chart covers Finland’s inland waters like Lake Saimaa. • Navigate on Finland’s marine area with familiar Finnish nautical charts. • Hike with the precise topographical maps. • Plan your routes on land and in the sea. • Check the weather forecast and find a place to rest from a guest harbor. ** The clearest and highest quality maps of Finland on the same app. ** The nautical charts and topographical maps are precise and in vector format. The nautical charts of the app are based on the material of the Finnish Transport Infrastructure Agency. The general nautical charts cover Åland, Archipelago, Gulf of Finland and Lake Saimaa. The topographical map is based on the most accurate material from National Land Survey of Finland. The combined view of the topographical map and nautical charts is even more detailed. You can use the maps also offline. Save the offline maps to your device and plan routes and navigate successfully, where ever you may roam. ** The advanced search covers thousands of locations. ** Navigate precisely to the destination. The search function of this app you can find the right places. The index is based on the location database of the National Land Survey of Finland. ** The AIS data helps you to identify other boats. ** See the maps from the bird’s-eye view (3D) and you can easily get a quick glance of your route. With the compass tool, you can measure distances and directions while navigating. Your track will be visualized on the map as a clearly distinguishable line. You can decide the length of the direction vector from the settings. ** Plan routes and save your favorite locations. ** Measure the distances between places, the length of the route and duration of the trip. You can easily save your favorite spots on the map. ** Stop by at the guest harbor. ** The app helps you to find the guest harbor along the Finnish coastline and on the lakeside. The services of the harbors are listed. The information is provided by Suomen Vierassatamat Ltd. ** Share your location and the spectacular view! ** You can share your location straight from the app to your favorite social media services. Choose one of your own images or a screenshot from the map to be shared. You can start sharing by long pressing your location icon on the map. ** Reliable weather forecast always at hand. ** The local weather forecast is provided by the Finnish Meteorological Institute. Up-to-date weather forecast requires that your device is online. ** The yearly subscription fee is only 34,99 €. Start now navigating with Loisto Mariner! ** The subscription period is 12 months from the purchase. The price includes all map updates and app updates. 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. The terms of use and the privacy policy can be found on https://tapio.fi/loisto-mariner-tietosuojalauseke/
Screenshots
Verdict
The clearest difference is chart position: C at #122 against Loisto Mariner's unranked. Loisto Mariner's advantage is iOS requirement (11.0 vs 15.1). On price, update cadence, ads and in-app purchases 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 9 in-app purchases, starting at $1.99 per month and Loisto Mariner sells 1 in-app purchase, starting at $29.99 per year. Whichever you choose, the download price is not the number that matters.
C ships an update every 6 weeks, Loisto Mariner every 2 months. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.
| Parameter | C | Loisto Mariner |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (2.4K ratings) — better | — |
| Positive reviews | 51.0% of reviews | — |
| Number of ratings | 2.4K — better | — |
| Update frequency | Every 6 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Best chart rank | #122 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 11.0 — better |
| Further details — not scored | ||
| Size | 169 MB | 93 MB |
| Age rating | 4+ | 4+ |
| Developer | Navico Norway AS | Tapio Palvelut Oy |
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
Loisto Mariner
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
- Caribbean14 Days trial$32.991 Year
- Maps USA East Coast & Bahamas14 Days trial$39.991 Year
Loisto Mariner
- Loisto Mariner7 Days trial$29.991 Year









