RT vs Fish Mapping
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Real-time oceanographic imagery
- Waypoint creation and editing
- Map zooming
- Point-to-point navigation
- Real-time GPS tracking
- Offline navigation capabilities
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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!
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.
- Fishing Recommendations
- Weed Lines
- Plankton Front Strength
- Sea Surface Temperature
- Sub-Surface Temperatures
- Sea Surface Height Anomalies
- Ocean Currents
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The Fish Mapping App delivers advanced, science-based fishing intelligence directly to your mobile device or desktop, helping you plan smarter and fish more efficiently. With the latest upgrades, the App now offers an enhanced experience with powerful new tools and expanded data layers designed to help anglers quickly identify fishing areas where conditions are best for bait fish to gather and where game fish are most likely to hunt. With the Fish Mapping App, anglers can view the following features on their mobile or desktop devices: • AI Hot Zones (updated daily) • Oceanographer Fish Recommendations (updated twice weekly) • Ocean data layers – Sea Temperatures, Plankton, Currents, Salinity, Thermocline (updated daily) • Altimetry & True-Color imaging (updated daily) • Bathymetry TWO WAYS TO GET FISH MAPPING • Download and then subscribe in the app for App-Only plan. Choose Annual Mobile, Annual Mobile + Desktop, or 1-Week Mobile + Desktop. • Already a SiriusXM Marine Fish Mapping satellite subscriber? Download and then activate the app with your receiver's Radio ID. The app is included with your satellite subscription. 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 Mobile or desktop devices to help plan your next fishing trip! App requires internet access. Learn more at siriusxm.com/fishmapping -------------------------- APP-ONLY PLAN OFFER DETAILS Choose either a 1-week or annual Fish Mapping App subscription plan. The 1-week plans do not renew and will end at the end of the stated term. If selecting an annual plan, service will AUTOMATICALLY RENEW each year at the then-current annual rate plus appl. tax, until you cancel. Cancel at least 24 hours before your renewal date in your Apple account (Settings → [your name] → Subscriptions) to avoid future charges. Cancellation is effective at the end of your then-current term. No refunds/credits unless permitted by Apple. App-only plans do not include satellite service. Internet access required. All fees, content, and features are subject to change. Service not available in AK or HI. SATELLITE SUBSCRIBERS Access to the app may take up to 24 hours from subscription activation to process. Satellite subscriptions require a compatible satellite-enabled device. App subscribers on a Mobile-only plan are limited to two (2) mobile devices. App subscribers on a Mobile + Desktop plan are limited to two (2) devices in any of the following combinations: 2 mobile devices, or 2 desktop devices, or 1 mobile and 1 desktop device. Changing to new devices can take up to 24 hours. Internet access is required for the Fish Mapping App. Data rates may apply. The SiriusXM Fish Mapping® App is administered by OceanBytes Holding LLC. Fish Mapping App Privacy Policy: www.siriusxm.com/fish-mapping-privacy-policy Terms of Use (SiriusXM Customer Agreement): www.siriusxm.com/customer-agreement
Screenshots
Verdict
The clearest difference is review sentiment: Fish Mapping at 50% against RT's 0%. Fish Mapping also leads on rating (4.2 vs 3.0) and iOS requirement (15.1 vs 26.0). RT's advantage is monetization model (free with in-app purchases vs subscription). 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
Both are free to download. RT sells 4 one-off in-app purchases and Fish Mapping sells 3 in-app purchases, starting at $199.00 per year. Whichever you choose, the download price is not the number that matters.
Fish Mapping holds the better App Store score, 4.2 against 3.0. Both are backed by a comparable volume of ratings — 8 and 5 respectively. Written reviews point the same way: 0% of RT's written reviews are positive against 50% of Fish Mapping's.
RT ships an update monthly, Fish Mapping every 3 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.
| Parameter | RT | Fish Mapping |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (8 ratings) | 4.2 (5 ratings) — better |
| Positive reviews | 0.0% of reviews | 50.0% of reviews — better |
| Number of ratings | 8 — better | 5 |
| Update frequency | Monthly | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases — better | Subscription |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 26.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 13 MB | 128 MB |
| Age rating | 4+ | 17+ |
| Developer | Hilton's Fishing Charts, L.L.C. | OceanBytes Holding LLC |
Customer experience
RT
Fish Mapping
In-app purchases
RT
- 1 Week Subscription$49.99
- 1 Month Subscription$99.99
- 1 Year Subscription$199.99
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- One Year International$199.99
Fish Mapping
- Annual Mobile$199.001 Year
- Annual Mobile + Desktop$299.001 Year
- 1-Week Mobile + Desktop$24.99






