iNavX vs Wärtsilä iSailor
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iNavX
This app provides comprehensive marine navigation tools, including worldwide chart coverage, weather forecasts, and AIS integration. It allows users to plan routes, track their position, and connect with onboard instruments for a complete boating experience.
- Worldwide marine chart access
- Real-time GPS plotting
- Waypoint and route management
- GRIB weather forecasts
- AIS integration
- Nautical instrument connectivity
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Marine navigation is made easy with iNavX - the world's #1 handheld Chartplotter. Access marine charts, maps, weather, AIS and more! iNavX is the only app to give you complete worldwide chart coverage, from all your favorite charts providers, including the ALL NEW iNavX Professional+ Chart series! Fully enabled with one-touch access, iNavX gives users access to the broadest set of marine charts and maps from multiple providers including: • iNavX Professional+ Charts • Blue Latitude • CHS • Explorer • Theyr Weather • Waterway Guide • … and more How does iNavX take handheld marine navigation to the next level? • Sailors - Plan sailing routes with waypoint and route management. Get proactive sail management with GRIB weather forecasts and then keep watch with AIS overlays and integration with your onboard systems. Plus, you can remember your great sailing locations by geotagging photos. • Boaters - Stay up to date on boating conditions with forecasts that include currents, winds, and swells. Manage your boating equipment with nautical instrument integration and then save great boating routes to share with the track log. • Anglers - Discover new fishing spots by scouting out holes and inlets. Locate the best fishing conditions by identifying cold fronts and save your best fishing spots with unlimited markers. Advanced features - iNavX is the most feature rich app available for all sailing and boating needs at a great price: Advanced Chart Plotter • Plot your position in real-time using your device's built-in GPS • Pan, zoom, and rotate charts (including course up) • Print detailed charts to use in combination with the app Advanced Navigation • Create waypoints and plan routes to navigate between them • Track log allows you to record your route • Import/export data in KML (Google Earth) or GPX format Advanced Instrumentation • Supports NMEA data over TCP/IP (using Wifi) • Integrates with external GPS, AIS receivers & transponders • Connect nautical instruments: Depth, Speed, Wind, Engine, Batteries, etc. Essential Toolkit • GRIB weather forecast • Tides/currents • Anchor alarm • AIS integration • Port/navaid search Download iNavX TODAY and automatically receive a complimentary copy of the official and up-to-date high-resolution NOAA RNC United States marine raster charts. REVIEWS “iNavX is the original and still one of the best navigation apps.” – Practical Sailor “The most full-featured navigation app around and viewed by many as the standard” – Sail Magazine "The #1 recommended marine charting app" - iMarineApps iNavX is Compatible with: Theyr Weather, Waterway Guide, AIS, Brookhouse, DigitalYacht, ShipModul, vYacht, Vesper Marine, NMEA 2000, Chetco and more. NEW CHART STORE Purchase all your favorite charts. Chart subscriptions vary by chart and provider from $9.99 to $199.99 annually, charged to your iTunes Account, which will automatically renew unless cancelled at least 24 hours before the end of the current period. Auto-renew can be turned off anytime by going to your Account Settings in iTunes after purchase. No cancellation of the current subscription is allowed during active subscription period. NOTE: Continued use of GPS running in the background can dramatically decrease battery life. MORE INFO Website: http://inavx.com/ User's Guide: http://inavx.com/help/ Terms of Use: http://inavx.com/terms Privacy Policy: http://inavx.com/privacy
Wärtsilä iSailor
This marine navigation app offers clear presentation of navigational information and electronic charts for amateur seafarers. It supports accurate TX-97 vector charts and provides various optional services like weather and AIS data.
- Electronic chart display
- GPS and AIS integration
- Route creation and monitoring
- Weather and tide information
- Chart correction service
- User object sharing
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Wärtsilä iSailor is an easy-to-use marine and river navigation application for amateur seafarers. iSailor provides a clear presentation of navigational information, electronic charts and additional content. TX-97 vector charts supported by iSailor are recognized worldwide as one of the most accurate and reliable sources of navigational information. Chart folios can be purchased and downloaded in the iSailor Chart Store utilizing the standard iTunes Store payment/purchasing procedure. Chart correction service is provided on annual basis via the auto-renewable subscription service. iTunes will charge payment after confirmation of the chart correction purchase. You may manage your subscriptions and turn off the auto-renewal service in the Account Settings. Your subscription will automatically renew unless auto-renewal is turned off at least 24 hours before the end of the subscription period. You can cancel your subscription in the Chart Store any time. All previously purchased chart folios will remain available for you and can be restored from the service via the Chart Restore function. To receive subsequent chart corrections for your purchased charts, you will need to subscribe to the annual updates in the Chart Store. The application works on iPhone and iPad using built-in GPS, NMEA Wi-Fi GPS or an external Bluetooth GPS. Supported devices (iOS version 11 and higher): • iPhone 5S or higher • iPad 5 generation or higher iSailor features: • Positioning system: iOS (Built-In GPS), NMEA GPS or AIS Class B (Option) • AIS Class A NavData interface (Option) • NMEA Heading and Rate-Of-Turn sensors (Option) • NMEA Echo Sounder with a graphical 2D echogram and water temperature sensor (Option) • NMEA Wind Sensor, including True & Relative wind calculation (Option) • NMEA Autopilot interface (Option) • Display of charts, routes, track(s) and user objects • AIS target presentation. Target contours and dimensions (Option) • Internet AIS service (Optional subscription) • Weather service (Optional subscription) • Tides and tidal currents (Optional subscription) • Sailing guides, regional marinas (Optional subscription) • North Up, COG Up, Head Up and Route Up chart orientations • Information on any vector chart objects • Free cursor, Point-To-Point and Own ship referenced ERBL functionality • Monitoring of navigational data: Position, Course (COG) and Speed Over Ground (SOG) • Route creation by the graphic and tabular methods. “Go To” routes. • Waypoint monitoring: Bearing to WP, Distance to WP, XTD, Time-To-Go and ETA • Schedule information: Time-To-Go and ETA to any selected waypoint ahead • Multi-language support • Multi-unit support • Custom track colors • Day and night chart palettes • Alarm monitoring functionality • Route, track and user object: export/import via GPX, KML and KMZ formats • Advanced Logging and Playback function (Option) • User object sharing via Facebook, Twitter, iMessenger, eMail NOTE: Continuous use of the GPS running in the background can dramatically decrease the battery life. Wärtsilä iSailor application may use your location even when it’s not open, which can decrease battery life of the device iSailor EULA: https://www.wartsila.com/docs/default-source/marine-documents/transas/WVL-EULA.pdf iSailor Privacy Notice: https://www.wartsila.com/legal-privacy/privacy Questions? Please contact us at isailor.support@wartsila.com Sincerely yours, iSailor Team
Screenshots
Verdict
The clearest difference is rating: iNavX at 4.8 against Wärtsilä iSailor's 3.3. iNavX also leads on ratings volume (22K vs 12). Wärtsilä iSailor's advantage is ads (none vs shown). On price, review sentiment, update cadence and in-app purchases 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. iNavX sells 10 in-app purchases, starting at $9.99 per month and Wärtsilä iSailor sells 10 in-app purchases, starting at $4.99 per year. Whichever you choose, the download price is not the number that matters.
iNavX holds the better App Store score, 4.8 against 3.3. That said, the two scores are not equally well evidenced: iNavX has 22K ratings behind it against 12, so its average is the more settled of the two. Written reviews split almost evenly too, at 44% and 45% positive.
iNavX ships an update every 5 weeks, Wärtsilä iSailor every 3 weeks. The most recent releases landed on November 5, 2026 and November 1, 2026 respectively.
| Parameter | iNavX | Wärtsilä iSailor |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (22K ratings) — better | 3.3 (12 ratings) |
| Positive reviews | 43.8% of reviews | 44.8% of reviews — better |
| Number of ratings | 22K — better | 12 |
| Update frequency | Every 5 weeks | Every 3 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | #134 — better | #173 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Apple Watch — better |
| Requires iOS | 13.0 | 13 |
| Further details — not scored | ||
| Size | 298 MB | 55 MB |
| Age rating | 4+ | 4+ |
| Developer | NavX Studios LLC | Wartsila Voyage Sweden AB |
Customer experience
iNavX
Wärtsilä iSailor
User reviews
iNavX
From 22K App Store ratingsWhat we love
- 🚀 Accurate and precise navigation
- 📊 Comprehensive charting and navigation features
- 🛠️ Customizable instrument settings
- 🔄 Redundancy across devices
- 💨 Reliable performance over many years
Room to improve
- 🤔 Clunky and unintuitive user interface
- 🗺️ Cumbersome chart management and downloading
- 🔋 Battery drain issues
- 💰 Expensive subscription model for charts
- 🐛 Stability issues and crashes
Wärtsilä iSailor
From 12 App Store ratingsWhat we love
- ✨ Excellent app for navigation
- 🗺️ Accurate and detailed charts
- 💰 Good value for money
- 🛳️ Reliable for offshore sailing
- 🔍 Helpful features like anchor alarm
Room to improve
- 🐛 Crashes and bugs after updates
- 🔄 Issues with restoring purchased charts
- 💰 Expensive subscription model for chart updates
- 🗺️ Missing or incomplete chart data in some regions
- 🔧 Poor customer support and lack of communication
Bugs and requests
iNavX
Reported bugs
3 issues- Inability to remove waypoints
- Inconsistent behavior when transitioning International Date Line
- Disappearing or missing chart data
Requested features
5 requests- Seamless chart switching and panning
- Integrated tidal and current data
- Support for more chart types and providers
- Improved route planning and editing tools
- Automatic chart updates and management
Wärtsilä iSailor
Reported bugs
4 issues- GPS position issues on iOS devices
- NMEA data not working after updates
- Inability to scroll past the date line
- Purchased charts not downloading properly
Requested features
5 requests- Automatic route planning
- Integration with boat's autopilot
- Improved weather and tidal data
- Cross-platform sync for user data
- Better AIS target display and management
In-app purchases
iNavX
- Theyr Premium - Mobile (Monthly) for iOS$9.991 Month
- iNavX Professional+ USA$29.991 Year
- Navionics+ USA/Canada (iPhone)$29.991 Year
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- Navionics+ Caribbean (iPhone)$44.991 Year
- Theyr Premium Weather$49.991 Year
- iNavX Professional+ USA Canada$59.991 Year
- C-MAP World Chart$59.991 Year
- Navionics+ USA/Canada (iPad)$79.991 Year
- Navionics+ Caribbean (iPad)$79.991 Year
- AIS Live$99.991 Year
Wärtsilä iSailor
- USA. Pacific Coast. CA$4.991 Year
- USA. Ri to the Canadian border$4.991 Year
- USA. Nantucket to Cap May, NJ$4.991 Year
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- USA.Chesapeake & Delaware bays$4.991 Year
- USA. Norfolk to Jacksonville$4.991 Year
- USA. Atlantic Coast. Florida$4.991 Year
- USA. Gulf Coast. Florida$4.991 Year
- USA. Pacific Coast. WA$4.991 Year
- Caribbean Sea. Lesser Antilles$10.991 Year
- AIS Receiver Support$11.99









