Comparison

C vs Atlas Seekarten

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

Atlas Seekarten

Access detailed worldwide digital nautical and lake charts for offline navigation. Features include route planning, waypoint management, and GPS data, all presented in an intuitive interface.

Highlights
  • Offline digital cartography
  • Detailed nautical and lake charts
  • Route planning and waypoint management
  • GPS data and track recording
  • Multiple map overlays
  • KML data sharing
Features
Read full description

Mapitech bringt Atlas auf den Markt, eine weltweite digitale Kartografie, die Vektordaten mit den besten aktualisierten Papierkarten kombiniert, z. B. Häfen, Tiefenlinien, Wracks, Angelstellen, Bootsrampen, POI und viele andere Features. Die Schönheit von Papierkarten, angereichert mit digitaler Kartografie. Kartendetails und Leistung eines professionellen GPS-Kartenplotters in Ihrer Hand. Ansprechendes Erscheinungsbild, einfach zu bedienen, nützlich an Bord. Die App funktioniert ohne Mobilfunkempfang (offline). Das interaktive Menü ist intuitiv und ermöglicht es Ihnen, Karten für den Offline-Gebrauch zu einem erstaunlichen Preis zu erwerben. Kostenlose Features und Funktionen: • Leistungsstarke Suche • Mehrere Überlagerungen für unterschiedliche Zwecke (Angeln, Segeln oder Kreuzen) • KML-Daten können geteilt werden • Sehr detaillierte und aktualisierte Karten • Unbegrenzte Wegpunkte • Markierungen und Favoriten • Lupe für alle Infos • Mehrere Tracks: Zeichnen Sie Ihren Track, die aktuelle Geschwindigkeit und den COG Kurs über Grund auf • Routenplanung, Wegpunkte - Geben Sie das Ziel ein und sehen Sie in Echtzeit Ihre Geschwindigkeit, Entfernung und Peilung • Fotoverwaltung mit Geo-tag, Per E-Mail teilen, auf Google sichtbar • Entfernungsmesswerkzeug zur einfachen Berechnung der Entfernung •Kompass • GPS-Fenster mit sehr detaillierten Informationen • Benutzerfreundlich auf dem neuesten iOS - MARINE KARTEN Detaillierte elektronische Seekarten (ENC), einschließlich Küstenstreifen, Ankerplätze, Fischzonen, Sperrgebiete, Hindernisse, Felsen, Bojen, Leuchtfeuer, Lichter, Tiefenkonturen, Ortungsmessungen und mehr. - SEEKARTEN Hochwertige Seekarten mit detaillierten Informationen und wichtigen Features: Tiefenlinien, Bootsrampen, Angelplätze usw. Die Karten enthalten auch Informationen zu Wanderwegen, Straßen und Eisenbahnen. KAUF ENTHÄLT: • Offline-Karte: Wählen Sie Ihr Lieblingsgebiet aus unserem Katalog und erhalten Sie eine detaillierte Karte Ihres Gebiets • Abonnement für 1 Jahr: Testen Sie all unsere Karten und Funktionen und abonnieren Sie sich für ein Jahr • Kauf auf Lebenszeit: Erhalten Sie alle unsere Karten und Funktionen auf Lebenszeit Mehr Info: Nutzungsbedingungen: https://mapitech.com/term.html Datenschutz-Bestimmungen: https://mapitech.com/privacy.html

Screenshots

C4 screens
Atlas Seekarten4 screens

Verdict

The call

The clearest difference is rating: C at 4.5 against Atlas Seekarten's 2.8. C also leads on ratings volume (2.4K vs 14) and chart position (#123 vs unranked). Atlas Seekarten's advantage is in-app purchases (none vs 10) and iOS requirement (12.0 vs 15.1). On price, update cadence, ads 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 9 in-app purchases, starting at $1.99 per month. Atlas Seekarten asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

C holds the better App Store score, 4.5 against 2.8. That said, the two scores are not equally well evidenced: C has 2.4K ratings behind it against 14, so its average is the more settled of the two. Written reviews point the same way: 51% of C's written reviews are positive against 41% of Atlas Seekarten's.

UpkeepUpdate frequency

C ships an update every 6 weeks, Atlas Seekarten every 5 weeks. Both last shipped on November 6, 2026.

Scorecard7 real differences · 4 level
C versus Atlas Seekarten: the parameters behind the verdict, then further details
ParameterCAtlas Seekarten
PriceFreeFree
Rating4.5 (2.4K ratings) — better2.8 (14 ratings)
Positive reviews51.0% of reviews — better40.7% of reviews
Number of ratings2.4K — better14
Update frequencyEvery 6 weeksEvery 5 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
Best chart rank#123 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.112.0 — better
Further details — not scored
Size169 MB155 MB
Age rating4+4+
DeveloperNavico Norway ASMapITech

Customer experience

C

All ratings2,347 ratings
Positive89.3%
Neutral3.1%
Negative7.6%
Written reviews512 reviews
Positive51.0%
Neutral8.6%
Negative40.4%

Atlas Seekarten

All ratings30 ratings
Positive76.7%
Neutral0.0%
Negative23.3%
Written reviews27 reviews
Positive40.7%
Neutral3.7%
Negative55.6%

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

Atlas Seekarten

Not enough reviews yet to summarise bugs or requests.

In-app purchases

9 purchases

C

Subscriptions9
  • Embark Advanced Weather$1.991 Month
  • Embark Offline Maps USA$2.491 Month
  • Annual Subscription14 Days trial$14.991 Year
Show 6 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
  • Caribbean14 Days trial$32.991 Year
  • Maps USA East Coast & Bahamas14 Days trial$39.991 Year
None

Atlas Seekarten

No in-app purchases

Questions

Is C free?
C is free to download, with in-app purchases available.
Is Atlas Seekarten free?
Atlas Seekarten is free to download, with no in-app purchases.
Which has better reviews, C or Atlas Seekarten?
C is rated higher. C averages 4.5 out of 5 from 2.4K ratings, while Atlas Seekarten averages 2.8 from 14 ratings.
Do C or Atlas Seekarten have ads?
Neither C nor Atlas Seekarten shows ads.
Which is updated more often, C or Atlas Seekarten?
C ships an update every 6 weeks, and Atlas Seekarten every 5 weeks. Most recently, C was updated on November 6, 2026 and Atlas Seekarten on November 6, 2026.

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