The 7 Best Marine Navigation Apps for US Waters in 2026

Seven apps that will put your boat on a US chart, sorted by what the charts cost and what the app does with them. Every price and rating below was read off the live US App Store page on 22 September 2026.

TL;DR

If you do not want to pay for charts at all, get Argo Navigation: the chart layer, the interactive map with marinas and anchorages, the logbook and the crowdsourced hazard reports are free for US, Canada and Caribbean water, and Argo Premium at $39.99 is what adds routing and offline charts. If you want official NOAA charts updated weekly plus US Army Corps of Engineers surveys for thin water, get Aqua Map Boating, where a US chart subscription is listed at $9.99 and the Master tier that carries the USACE data is $24.99, bought separately from the charts. If you need charts from more than one provider, or coverage past North America, get iNavX, which includes the official NOAA raster charts for the US at no cost and sells Navionics, C-MAP and other providers through a single chart store. If you want the passage planned against your own boat's draft without buying a chart subscription on top of the app, get Helm Boating at $99.99/year.

How this list was built

Every price, rating, coverage claim and feature named in this piece was read off the live US App Store page for that app on 22 September 2026. Prices are quoted the way the store printed them. Several of these pages list a price without saying whether it covers a month or a year, and where that happens it is said so here rather than filled in with a guess. Ratings are given as the US average and the number of ratings behind it, because those two numbers together say more than a star count alone: 4.65 from 876 people and 4.76 from 21,710 people are not the same evidence.

The apps sorted into three groups by how you get charts, which is the thing that decides most of these purchases.

• Charts included in what you pay: Helm Boating at $99.99/year, and Argo Navigation, whose chart layer for the US, Canada and the Caribbean is free before you pay anything.
• Charts sold per region on top of the app: Navionics Boating, Aqua Map Boating and TZ iBoat all work this way, and so does iNavX once you go past its free NOAA raster charts. The app itself is free or cheap, and the chart subscription is the real cost.
• One tier priced by how much of the world you want: Savvy Navvy, which sells US-only charts and global charts as different products at different prices.
• A fourth thing worth sorting on: hardware. Navionics, Aqua Map, iNavX and TZ iBoat each have features that do nothing without onboard instruments, a chartplotter, a sounder or a Wi-Fi AIS receiver. If your boat has none of that, those features are not part of what you are buying.

1. Argo Navigation

Argo Technologies gives away the chart layer and charges for the navigation built on top of it. It holds the highest rating on this list, 4.90 from 6,184 US ratings. For a boater who mostly wants to see where they are on a real chart and find the next marina, the free tier is a complete answer.

• Best for: US, Canada and Caribbean water, including the ICW, inland lakes and rivers, without paying for charts
• Pricing: Free with In-App Purchases. The page lists Argo Premium $39.99, Argo Premium Monthly $6.99, Argo Canada Charts $9.99 and Monthly Canada Charts $2.99
• What works: NOAA charts and US Army Corps of Engineers data plot under live GPS tracking, with NOAA weather and wind overlaid and tides, currents, temperature, wave height and wave period alongside. The interactive map lists marinas, anchorages, boat ramps, restaurants and dock bars with reviews. There is a voyage logbook, crowdsourced hazard reports, depth updates and tips from other boaters, and a community view of where other boats are cruising. The chart layer, the map, the logbook and the crowdsourced local knowledge cost nothing; the paid tier is the routing and offline layer
• Limits: Chart, weather, tide and current coverage is stated only for the US, Canada and the Caribbean, with no other region claimed. Canada charts are a separate purchase from Premium at $9.99, or $2.99 monthly. Smart Routes, which route around hazards and shallows by draft and height, are Premium only, as are offline charts, 7-day forecasts, custom depth contours, GPX import and export to a chartplotter, and multi-vessel support. English is the only listed language

2. Aqua Map Boating

Aqua Map, from GEC s.r.l., is built around official NOAA charts updated weekly, with local government survey data layered on in the top tier. It rates 4.72 from 13,682 US ratings. If your boating involves water shallow enough that you care what the Corps of Engineers measured last, this is the app on this list that says so on its page.

• Best for: Official NOAA charts updated weekly, and shallow water where USACE survey data is the thing you actually need
• Pricing: Free to download with In-App Purchases, and the page states "Free 14-day trial for all subscriptions." The listed purchases are Aqua Map Master $24.99; US - Nautical & Lakes charts $9.99; US & Canada - nautical charts $14.99; Bahamas - Explorer Charts $49.99; US & Canada - Nautical chart $49.99; Caribbean South Nautical chart $14.99; Aqua Map Expert $14.99; Bahamas - Explorer Chartbooks $139.99; Canada - nautical charts $9.99; Bermuda - nautical charts $14.99. The page shows only its top ten purchases and prints no billing period next to any price, though the description says the annual subscription renews automatically unless canceled at least 24 hours before expiration
• What works: You buy a chart subscription for your area and download map areas for offline use. The base app does manual and automatic route planning, GPS track recording, stored and shared markers, routes and tracks, tide and current predictions with simulations, an Anchor Alarm, Live Sharing with other Aqua Map users, and points of interest from the ActiveCaptain and Waterway Guide communities. The paid Expert and Master tiers add marine forecasts covering wind, waves, currents, gusts, salinity and sea surface temperature, a satellite image overlay, AnchorLink with anchorage mirroring and email or telegram notifications, NMEA instrument connection over Wi-Fi to autopilot, depth sounder, wind sensor, compass and GPS, AIS with automatic collision detection, and Route Explorer. Master is the tier that carries the US Army Corps of Engineers surveys
• Limits: The Expert and Master subscriptions do not include charts and must be paired with a chart subscription, so the real price is two purchases. Chart purchases on the page cover the US, US and Canada, Canada, the Bahamas, Caribbean South and Bermuda. Note that two different US and Canada chart entries appear at $14.99 and at $49.99, and the page does not explain the difference. Master-tier local data is listed only for the US, Canada, France, Denmark and Western Australia. NMEA instrument connection needs onboard instruments over Wi-Fi and is Expert or Master only

3. iNavX

iNavX, from NavX Studios LLC, is a chartplotter that sells other companies' charts. It carries 4.76 from 21,710 US ratings, the largest rating count on this list by a wide margin. Its own description calls it the only app giving complete worldwide chart coverage from all your favorite chart providers, and the chart store is genuinely the point of it.

• Best for: Buying charts from several providers inside one app, and for anyone who wants the official NOAA US raster charts at no cost
• Pricing: Free with In-App Purchases. The page lists Navionics+ USA/Canada (iPhone) $29.99; Navionics+ USA/Canada (iPad) $79.99; Navionics+ Caribbean (iPhone) $44.99; Navionics+ Caribbean (iPad) $79.99; iNavX Professional+ USA $29.99; iNavX Professional+ USA Canada $59.99; C-MAP World Chart $59.99; AIS Live $99.99; Theyr Premium Weather $49.99; Theyr Premium - Mobile (Monthly) $9.99. The description adds that chart subscriptions vary by chart and provider from $9.99 to $199.99 annually, renewing automatically unless canceled at least 24 hours before the end of the current period
• What works: Your position plots in real time from the device GPS over charts you can pan, zoom, rotate including course-up, and print. It handles waypoints, route planning, a track log, and import and export in KML or GPX. It carries GRIB weather forecasts, tides and currents, an anchor alarm, AIS integration and port and navaid search. It takes NMEA data over TCP/IP via Wi-Fi to connect external GPS, AIS receivers and transponders, and instruments for depth, speed, wind, engine and batteries. The in-app store sells iNavX Professional+, Navionics+, C-MAP, Blue Latitude, CHS, Explorer, Theyr Weather and Waterway Guide
• Limits: What comes free is US-only: the complimentary charts on download are the official, up to date, high resolution NOAA RNC United States raster charts, and every other region is a separate paid purchase. Chart purchases are split by device, so the iPhone and iPad editions of the same Navionics+ chart are separate products at different prices, $29.99 against $79.99 for USA and Canada. Subscriptions renew automatically and the page states that no cancellation of the current subscription is allowed during the active subscription period. Instrument, AIS and external GPS features need onboard hardware and a Wi-Fi NMEA-over-TCP/IP source, with Theyr Weather, Waterway Guide, AIS, Brookhouse, DigitalYacht, ShipModul, vYacht, Vesper Marine, NMEA 2000 and Chetco named as compatible. The page warns that continued use of GPS in the background can dramatically decrease battery life

4. Helm Boating

Charts, depth and routing for US water, built on the public NOAA data rather than a chart subscription. Disclosure: we make this one.

• Best for: Boating US coastal water, the Great Lakes, the rivers and inland lakes, where you want the route planned against your own draft
• Pricing: $99.99/year, about $8.33/month. Free trial before any charge, no card up front
• What works: Routes plan at chart datum against the draft you enter, and report the shallowest point and the lowest charted bridge clearance on a leg before you commit. Depth merges NOAA ENC, USACE eHydro surveys, state lake elevation and live NOAA tide into one number, with the survey date and the chart's CATZOC confidence shown beside it. 161 downloadable chart packs covering coastal, Great Lakes, 15 commercial rivers and lakes in 48 states, all working with no signal. AIS, anchor alarm, logbook, CarPlay, native iPad layout
• Who it is for: Anyone who would rather not buy a chart subscription on top of the app, since the NOAA charts it runs on are public data
• Verdict: Released September 2026, so it is the newest thing on this list. The reason to try it is the routing: enter the boat once and the passage is planned around water it cannot cross
• Try it: helmboating.app

5. Navionics Boating

Navionics Boating is published by Garmin International, and it is the outlier on ratings here: 2.86 from 2,347 US ratings, below every other app on this list. The reason people still buy it is the charts and the hardware it talks to. If you own a compatible Garmin chartplotter or sonar, nothing else on this list offers Plotter Sync or SonarChart Live.

• Best for: Navionics charts themselves, SonarChart HD bathymetry, and syncing routes with a compatible chartplotter
• Pricing: Free to download with In-App Purchases. The page describes a yearly auto-renewable subscription and shows Free Trial on the subscription offers, with each entry described as "One year: charts, routing, weather and more." Listed purchases are US & Canada $49.99; Mexico, Caribbean to Brazil $49.99; Mediterranean & Black Sea $59.99; Africa & Middle East $49.99; Pacific Islands $49.99; Adriatic & Ionian Seas $69.99; Central and West Europe $59.99; Indian Ocean and South China $49.99; Australia & New Zealand $49.99; UK, Ireland & Holland $49.99
• What works: Navionics nautical charts, SonarChart HD bathymetry at 1 ft (0.5 m) contour detail, US Government NOAA charts, and overlays for relief shading, sonar imagery and satellite imagery, all downloadable and usable offline. Auto Guidance+ plans dock to dock with ETA, distance, heading and fuel consumption. Weather comes with daily and hourly forecasts, wind, weather buoys, tides and currents. There are markers, track recording with in-app photos and videos, distance measurement, and GPX import and export, plus Community Edits and the ActiveCaptain community, and sharing of location, tracks and routes with other boaters. On the hardware side it offers Plotter Sync with a compatible chartplotter, SonarChart Live real-time mapping with a compatible sonar or plotter, and AIS traffic through a compatible Wi-Fi AIS receiver. The page claims thousands of daily chart updates worldwide
• Limits: Charts and advanced features require the yearly auto-renewable subscription once the free trial ends. Coverage is sold per region rather than in one purchase, with ten separate regional products listed and further subscriptions shown for Scandinavia South and Germany North, Norway and the Baltic Sea. The US Government NOAA charts are available only within the US and Canada, Mexico, and Caribbean to Brazil coverages. Sonar imagery is on select lakes. Plotter Sync, SonarChart Live and AIS each depend on compatible hardware you have to own. The page states that Auto Guidance+ is for planning purposes only and does not replace safe navigation operations. A Wi-Fi only tablet locates your approximate position only when connected to Wi-Fi

6. TZ iBoat

TZ iBoat comes from Nobeltec, Inc. and rates 4.65 from 876 US ratings, the smallest sample on this list. It is the most modular app here: the core is free, and almost everything else is a plan or a module you add. It leans harder toward fishing and toward boats with real electronics aboard than anything else compared here.

• Best for: Fishing with ocean data layers, and boats with radar, a sounder or NMEA instruments to connect
• Pricing: Free to download with In-App Purchases. Listed are Essential Subscription $2.99; AIS module $8.99; Premium Subscription $9.99; USA $19.99; Canada West $19.99; Great Lakes $19.99; Bahamas $30.99; Central America & Caribbean $30.99; Elite Subscription $39.99; Radar module $49.99. The description says monthly and annual plans are available with savings on yearly options and that core features remain free. The page does not state which billing period each of those prices covers
• What works: TZ MAPS supplies vector, raster, satellite and bathymetry charts, usable online or offline, with Smart Search for marinas, buoys, tide stations and routes, Dynamic Lights showing real-time light sectors, and Dynamic Moorings that account for wind at an anchorage. There are dedicated screens for Weather, Fishing, NavData, Logbook, Mooring, Tides and Sounder, NMEA connectivity to AIS, radar, autopilot and instruments, and Community Maps for sharing hazards, points of interest and marinas. For fishing it identifies productive zones from sea surface temperature, chlorophyll, currents and altimetry, and adds BATHYVISION high-resolution bathymetry with contour lines plus Event and Catch logging on the chart
• Limits: The gating is layered. AIS Online, which pulls global AIS targets over the internet, requires the Essential plan, as does onboard instrument and autopilot integration over Wi-Fi NMEA. High-resolution forecasts, Rain Radar and multiple model comparison require Premium. The ocean layers for sea surface temperature, chlorophyll, sea surface height and currents require Elite, the $39.99 tier. Radar, sounder, AIS and NMEA functions all depend on hardware you connect. The app is not restricted to one country and calls its AIS Online global, but the chart packs sold on the US page cover only the USA, Canada West, the Great Lakes, the Bahamas, and Central America and the Caribbean

7. Savvy Navvy

Savvy Navvy, from SAVVY NAVVY LTD, rates 4.68 from 8,202 US ratings and claims more than 2 million downloads. Its argument is a simpler screen: take the clutter out of nautical data and put planning, weather and tides on one surface. It is also the app on this list whose App Store page tells you the least about what you are buying.

• Best for: An uncluttered planning screen, and boaters who want one purchase that covers charts beyond the US
• Pricing: Free with In-App Purchases. The page lists Premium $99.00, Premium (US-only charts) $129.00, Premium (US-only charts) $99.00, and Premium Plus (global charts) $169.00. The page does not state the billing period for any of these
• What works: The named features are Clutter-Free Charts, Smart Route Planning, Real-Time GPS Tracking, a Departure Scheduler, AIS Data for Safety, Marine Weather Forecasts, Tides and Currents, and Marina and Anchorage Info. The page says the charts are drawn from official, regularly updated hydrographic data with live weather from top sources, that improved offline support and enhanced alerts help you stay in control off the grid, and that there is a free version to explore before upgrading. It names sailors, powerboaters, fishermen, jetskiers, kayakers and paddleboarders as its users
• Limits: The purchase list itself splits coverage, with US-only charts and global charts sold as separate tiers and global priced higher. Two different prices, $129.00 and $99.00, are shown for a purchase with the same Premium (US-only charts) name, and the page does not explain the difference. The page does not state a free trial length or any subscription duration. It also makes no mention of required or supported hardware, with no reference to an autopilot, a chartplotter, Apple Watch or CarPlay

How to choose

Work out two things before you look at prices: whether you are willing to pay a chart subscription separate from the app, and whether your boat has electronics worth connecting to. Those two answers eliminate most of this list for you. Each situation below points at one app, and every one of them is a defensible purchase for the reader it names.

• You do not want to pay for charts at all: Argo Navigation, free for US, Canada and Caribbean water, with $39.99 Premium only if you want routing and offline charts
• You need Army Corps of Engineers survey data for shallow water and official weekly NOAA updates: Aqua Map Boating, budgeting for both the Master tier and a chart subscription
• You want charts from several providers, or coverage outside North America: iNavX, which bundles the free NOAA US raster charts and sells the rest in one store
• You want the route planned around your own draft with no chart subscription on top: Helm Boating at $99.99/year
• You already own a compatible chartplotter or sonar and want Plotter Sync or SonarChart Live: Navionics Boating, accepting the 2.86 rating and the per-region chart subscriptions
• You fish and want sea surface temperature, chlorophyll and current layers, or you have radar and a sounder to connect: TZ iBoat, with the Elite tier for the ocean layers
• You want the simplest planning screen and one tier covering global charts: Savvy Navvy, understanding that its page does not state billing periods or trial length