Comparison

RT vs Fish Mapping

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

Head to head
About

RT

Navigate using real-time oceanographic data like sea surface temperatures and currents on your mobile device. Create and edit waypoints, zoom maps, and track your GPS location for point-to-point navigation. Access dynamic maps even without cell service.

Highlights
  • Real-time oceanographic imagery
  • Waypoint creation and editing
  • Map zooming
  • Point-to-point navigation
  • Real-time GPS tracking
  • Offline navigation capabilities
Features
Read full description

Hilton's Realtime-Navigator Mobile Navigation Application. Navigate on almost real-time imageries such as sea surface temperatures, chlorophyll, surface currents, altimetry, and salinity using your iPad, iPhone, and/or iPod device(s) as your chartplotter! Features include: -Ability to create waypoints/routes "On the fly" -Waypoint creation and editing -Map zooming -Point to point navigation -Real-time GPS location -Ability to change chart selection "On the fly" The RT-Nav app interfaces with the RT-Nav.com website to provide a platform to allow subscribers the ability to navigate on desired RT-Nav.com images using youriPad, iPhone, and/or iPod device(s) as a chartplotter. View your real-time position on dynamic maps outside of cell/internet range navigating to temp breaks (probable weedlines), color changes, or default/custom waypoints by using our touch-screen technology!

About

Fish Mapping

This app provides detailed fishing recommendations and environmental data to help anglers find the best spots for bait and game fish. It displays information like plankton strength, sea surface temperature, and ocean currents to optimize fishing trips.

Highlights
  • Fishing Recommendations
  • Weed Lines
  • Plankton Front Strength
  • Sea Surface Temperature
  • Sub-Surface Temperatures
  • Sea Surface Height Anomalies
  • Ocean Currents
Features
Read full description

Let SiriusXM Marine Fish Mapping help save time and fuel by showing you the spots where conditions are best for bait fish to gather and where game fish are most likely to hunt. The Fish Mapping App is included with your SiriusXM Marine Fish Mapping subscription. With the Fish Mapping App, anglers can view the following features on their phone or tablet: • Fishing Recommendations • Weed Lines • Plankton Front Strength & Contours • Sea Surface Temperature Front Strength & Contours • 30m Sub-Surface Temperatures • Sea Surface Height Anomalies • Ocean Currents • Historical Data Note: SiriusXM Marine weather features are not available on the Fish Mapping App. Download the Fish Mapping App now and start using it on your smartphone or tablet to help plan your next fishing trip! App requires internet access. Not a Fish Mapping subscriber? Learn more at siriusxm.com/fishmapping. -------------------------- The Fish Mapping App is only available with your Fish Mapping subscription and subscriptions require a compatible satellite-enabled device. The Fish Mapping App is not sold separately. Access to the app may take up to 24 hours from subscription activation to process and access is limited to 2 devices. Internet access is required for the Fish Mapping App. Data rates may apply. Subscription and service fees, content, and features are subject to change. IMPORTANT INFORMATION: Not all devices are capable of receiving all services offered by SiriusXM. Current information and features may not be available in all locations, or on all receivers. Data displays vary by device; images are representative only. SiriusXM services may include weather and other content and emergency alert information. Such information and data is not for “safety for life,” but is merely supplemental and advisory in nature, and therefore cannot be relied upon as safety critical in connection with any aircraft, seacraft, automobile, or any other usage. SiriusXM is not responsible for any errors or inaccuracies in the data services or their use. See Fish Mapping coverage area at siriusxm.com/marine/coverage-map. SiriusXM Privacy Policy: www.siriusxm.com/privacy Your Privacy Choices: www.siriusxm.com/yourprivacychoices SiriusXM Customer Agreement: www.siriusxm.com/customeragreement

Screenshots

RT4 screens
Fish Mapping3 screens

Verdict

The call

The clearest difference is review sentiment: Fish Mapping at 50% against RT's 0%. Fish Mapping also leads on rating (3.7 vs 3.0) and in-app purchases (none vs 5). RT's advantage is chart position (#197 vs unranked). On price, ratings volume, update cadence and ads 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. RT sells 5 one-off in-app purchases. Fish Mapping asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Fish Mapping holds the better App Store score, 3.7 against 3.0. Both are backed by a comparable volume of ratings — 8 and 3 respectively. Written reviews point the same way: 0% of RT's written reviews are positive against 50% of Fish Mapping's.

UpkeepUpdate frequency

RT ships an update monthly, Fish Mapping every 3 weeks. The most recent releases landed on September 23, 2026 and September 9, 2026 respectively.

Scorecard6 real differences · 5 level
RT versus Fish Mapping: the parameters behind the verdict, then further details
ParameterRTFish Mapping
PriceFreeFree
Rating3.0 (8 ratings)3.7 (3 ratings) — better
Positive reviews0.0% of reviews50.0% of reviews — better
Number of ratings8 — better3
Update frequencyMonthlyEvery 3 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterSubscription
Best chart rank#197 — better—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS26.013.4 — better
Further details — not scored
Size13 MB57 MB
Age rating4+4+
DeveloperHilton's Fishing Charts, L.L.C.OceanBytes Holding LLC

Customer experience

RT

All ratings8 ratings
Positive37.5%
Neutral25.0%
Negative37.5%
Written reviews4 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Fish Mapping

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

5 purchases

RT

One-time5
  • 1 Day Subscription$29.99
  • 1 Week Subscription$49.99
  • 1 Month Subscription$99.99
Show 2 more
  • 1 Year Subscription$199.99
  • One Year International$199.99
None

Fish Mapping

No in-app purchases

Questions

Is RT free?
RT is free to download, with in-app purchases available.
Is Fish Mapping free?
Fish Mapping is free to download, with no in-app purchases.
Which has better reviews, RT or Fish Mapping?
Fish Mapping is rated higher. RT averages 3.0 out of 5 from 8 ratings, while Fish Mapping averages 3.7 from 3 ratings.
Do RT or Fish Mapping have ads?
Neither RT nor Fish Mapping shows ads.
Which is updated more often, RT or Fish Mapping?
RT ships an update monthly, and Fish Mapping every 3 weeks. Most recently, RT was updated on September 23, 2026 and Fish Mapping on September 9, 2026.

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