CourseSpeed vs Argo Navigation
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CourseSpeed
This navigation app provides real-time course, speed, and position data on a clear display. It offers turn-by-turn navigation with voice prompts, map overlays, and the ability to save tracks and points of interest. Additional features include sunrise/sunset times, horizon distance calculation, and specialized functions for sailing and geocaching.
- Real-time course, speed, and position display
- Turn-by-turn navigation with voice prompts
- Map view with track history and waypoints
- Save and load track history and points of interest
- GPX file export for computer viewing
- Sunrise/sunset times and horizon distance calculator
- Anchor watch and geocaching search functions
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App Summary: Although the CourseSpeed App was developed for boating, the App can be used anywhere, for example Boating, Hiking, Bike Riding, and Geocaching. The app was developed to conveniently have Course, Speed, and Position available on one screen in sufficiently large fields to be seen several feet away from the iPhone as well as to show the current position on a map. However, it also provides other views that perform the following, additional useful functions: 1. Allows the current position to be followed on any of three map types and, from the map, get Turn-by-turn navigation directions with voice prompts to anywhere. The current track history can be displayed along with user entered waypoints along the track line. Both the track history and waypoints can be saved to a history file. Saved history files can be loaded to the map later for reference. 2. Allows Point-Of-Interest map pins to be added to the map. These are also saved to a file and displayed whenever the App is started and are independent of the track history Waypoints. The Map Point-Of-Interest pins can be edited or deleted. 3. Saving track points in a GPS Exchange Format (GPX) file which can be moved to a computer. The GPX track may then be viewed on any mapping program/web site that reads GPX files. 4. For the current location, displays the times of sunrise and sunset as well as the current Sun azimuth and elevation for the current day, or any other day with user date input. 5. Provides a Horizon Distance Calculator that calculates the distance an observer can see for any height of an observer and any height of an object. 6. Provides the capability to add a Mark point on the Map to which Speed-Made-Good and bearing is displayed. (Useful for sailors, geocachers, hikers) 7. Provides a Speed-Made-Good-To-Windward indication for sailers. 8. Provides an "Anchor Watch" function for boaters to determine if their anchor is "dragging". 9. Provides a Geocaching search function to use a user entered "Mark" as a geocache location. 10. Allows the management of track history files, and GPX files; i.e. renaming or deleting them. 11. Allows the following settings to be saved automatically whenever the user changes them. The settings are selectable from either the "Settings" view or other views. All are saved to a file on the iPhone and restored when the App is restarted: 1 Speed smoothing enabled 2 Course smoothing enabled 3 Course smoothing type 4 Use fractional speeds when speed less than 10 enabled 5 Enabling the recording of a GPX format track file. 6 Latitude/Longitude display format 7 Elevation Display Mode 8 Course display format 9 Speed display format 10 Map type 11 Horizon Distance units 12 Enabling/disabling Speed-Made-Good function 13 Wind Direction 14 Anchor Distance The CourseSpeed iPhone App supports Apple's "Light" and "Dark" modes. The CourseSpeedWatch App is also available for use with a paired iPhone running the CourseSpeed App. The CourseSpeedWatch App functionality is a subset of the iPhone App functionality and contains only data fields and buttons but no mapping capability. The following data fields/buttons are visible on a single, scrolling, screen: 1 Position (Latitude & Longitude) 2 GPS receiver Accuracy (Horizontal & Vertical) 3 Course 4 Speed 5 Altitude 6 Trip 1 Odometer value 7 Trip 1 Odometer Start/Pause/Resume button 8 Trip 1 Odometer Reset button 9 Trip 2 Odometer value 10 Trip 2 Odometer Start/Pause/Resume button 11 Trip 2 Odometer Reset button 12 Distance to a user entered Mark 13 Bearing to a user entered Mark 14 Start/Stop/Clear track button 15 Save track button 16 Current track distance 17 Sunrise time 18 Sunset time The CourseSpeedWatch App supports one watch face "complication" called "Sun Rise/Set". A detailed description of all the functions and options is available from the App's "About" page and also on the web at santuit-sw.weebly.com (Then click on the CourseSpeed App and CourseSpeedWatch App)
Argo Navigation
This app provides comprehensive navigation and planning tools for boaters, offering features like chart plotting, route planning, and weather forecasts. It aims to be user-friendly for all skill levels, from beginners to experienced cruisers, with a focus on safety and connectivity on the water.
- Web/Desktop planning with auto-sync
- Autorouting for multi-stop trips
- 7-day marine weather forecast
- Unlimited nautical charts (NOAA/USEACE)
- Record and save tracks
- Real-time NMEA/AIS data
- Location and route sharing with groups
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Argo is a boat navigation app you can actually use for free. Not a trial. You get NOAA charts and U.S. Army Corps of Engineers depth surveys for US waters, 500,000+ marinas, anchorages and fuel docks, hazards reported by other boaters, and routes you plot yourself, with ETA and fuel use. On your first trip, open the map to see how deep it is and read what other boaters say about the anchorage before you drop the hook. A hundred trips in, you're checking how old the Army Corps survey is before you run a shoaling inlet, or laying out a few route options and picking one underway. Think of Argo as the boating buddy who knows every good dock bar and never asks for gas money. FREE FOR EVERY BOATER Navigate • Up-to-date NOAA charts plus Army Corps (USACE) surveys you can filter by survey date • Shoal areas, dredged channels, restricted areas and recommended tracks on the coast and inland rivers • See your GPS position and speed on the chart • Search buoys, beacons, lights, wrecks and mile markers • Record your track and use Return to follow it back • Depth shading presets, including two built for bright sun glare Plan • Search 500,000+ places, from boat ramps and moorings to non-ethanol fuel and dock bars • Read reviews from boaters who've been there • Plot your own route on the map and see distance, ETA and fuel use • A trip log of everywhere you've been Connect • See other Argo boaters on the water and share your live location with family ashore • Join your boat club, marina or rally group • Share routes, places and trips, and post photos and video • Report hazards and see the ones other boaters have reported • Keep fishing spots private or share them with your group One account works on every phone and tablet you own, free. ARGO PREMIUM, WHEN YOU WANT MORE Smarter routes • Autoroute plans around shallow water, hazards and restricted areas based on your boat's draft, height and safety buffer • Run inside or outside, or set Autoroute to stay in the marked channel • Save several routes to your chart, start a track, and choose between them underway • Have a sailboat and a powerboat? Save both, each with its own draft and height Marine weather and tides • 7-day marine forecast: weather, wind, wave height and period, tides and currents • Wind, rain and lightning overlays on your chart • 6,000+ tide and current stations on your chart, with predictions as far ahead as you want • Tide variance right next to your depth gauge On the water • Offline charts download automatically around your location and home port, for when you lose signal • Connect over NMEA (Wi-Fi gateway) for depth, speed and heading from your electronics, plus AIS targets • Custom depth shading and contours, so shallow water and fishing drop-offs stand out • Distance, time, bearing and course to your next turn, always in view Logbook and planning tools • Import and export GPX routes and tracks between Argo and your chartplotter • Download a PDF trip report to document sea time toward your captain's license Coverage: US coastal waters, the ICW, inland lakes and rivers, Canada and the Caribbean. WHO'S BEHIND ARGO Argo is family-owned. Our founder, Captain Jeff, grew up boating on the Chesapeake Bay. He built Argo so the local knowledge usually shared between friends at the dock is on the map for everyone. Many of our features started as boater requests. Send yours to support@argonav.io. Argo is a navigation aid. Always check official charts and conditions, and use your own judgment on the water. Plan. Navigate. Connect. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.argonav.io/privacy/
Screenshots
Verdict
The clearest difference is in-app purchases: CourseSpeed at none against Argo Navigation's 4. CourseSpeed also leads on iOS requirement (12.0 vs 15.1). Argo Navigation's advantage is update cadence (every 4 days vs every 4 weeks) and ratings volume (6.2K vs 2). On price, rating, 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
Both are free to download. Argo Navigation sells 4 in-app purchases, starting at $2.99 per month. CourseSpeed asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for CourseSpeed against 4.9 for Argo Navigation. That said, the two scores are not equally well evidenced: Argo Navigation has 6.2K ratings behind it against 2, so its average is the more settled of the two.
CourseSpeed ships an update every 4 weeks, Argo Navigation every 4 days. The most recent releases landed on October 2, 2026 and October 17, 2026 respectively.
| Parameter | CourseSpeed | Argo Navigation |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | 4.9 (6.2K ratings) |
| Positive reviews | — | 84.5% of reviews |
| Number of ratings | 2 | 6.2K — better |
| Update frequency | Every 4 weeks | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Best chart rank | — | #67 — better |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 12 MB | 138 MB |
| Age rating | 4+ | 4+ |
| Developer | David Jennings | ARGO TECHNOLOGIES, LLC |
Customer experience
CourseSpeed
Argo Navigation
Bugs and requests
CourseSpeed
Not enough reviews yet to summarise bugs or requests.
Argo Navigation
Reported bugs
2 issues- Login/account creation issues
- Slow map loading times
Requested features
3 requests- Improved offline map capabilities
- Integration with marine weather data
- Enhanced route planning tools
In-app purchases
CourseSpeed
No in-app purchases
Argo Navigation
- Monthly Canada Charts14 Days trial$2.991 Month
- Argo Premium Monthly14 Days trial$6.991 Month
- Argo Canada Charts14 Days trial$9.991 Year
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- Argo Premium14 Days trial$39.991 Year









