Wärtsilä iSailor vs NavNet
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
NavNet
Access your Furuno NavNet TZtouch series navigation data and fish finder images remotely on your iOS devices. Connect your iPhone, iPad, or iPod to your onboard system for convenient viewing.
- Remote navigation data viewing
- Fish finder image streaming
- iOS device connectivity
- Works with NavNet TZtouch series
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This app works with the Furuno NavNet TZtouch series to see navgation information onboard and Fish Finder images remotely. Get your iOS devices connected to the NavNet TZtouch!
Screenshots
Verdict
The clearest difference is rating: Wärtsilä iSailor at 3.3 against NavNet's 2.8. Wärtsilä iSailor also leads on update cadence (every 3 weeks vs every 5 months) and review sentiment (45% vs 33%). NavNet's advantage is in-app purchases (none vs 13) and iOS requirement (8.0 vs 13). On price, 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. Wärtsilä iSailor sells 13 in-app purchases, starting at $4.99 per year. NavNet asks for nothing beyond the download.
Wärtsilä iSailor holds the better App Store score, 3.3 against 2.8. Both are backed by a comparable volume of ratings — 12 and 4 respectively. Written reviews point the same way: 45% of Wärtsilä iSailor's written reviews are positive against 33% of NavNet's.
Wärtsilä iSailor ships an update every 3 weeks, NavNet every 5 months. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.
| Parameter | Wärtsilä iSailor | NavNet |
|---|---|---|
| Price | Free | Free |
| Rating | 3.3 (12 ratings) — better | 2.8 (4 ratings) |
| Positive reviews | 44.8% of reviews — better | 33.3% of reviews |
| Number of ratings | 12 — better | 4 |
| Update frequency | Every 3 weeks — better | Every 5 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPad, iPod |
| Requires iOS | 13 | 8.0 — better |
| Further details — not scored | ||
| Size | 55 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | Wartsila Voyage Sweden AB | 株式会社フルノソフテック |
Customer experience
Wärtsilä iSailor
NavNet
Bugs and requests
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
NavNet
Not enough reviews yet to summarise bugs or requests.
In-app purchases
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
- The Bahamas$10.491 Year
- Caribbean Sea. Lesser Antilles$10.991 Year
- AIS Receiver Support$11.99
- Tides & Currents subscription$11.99
- Internet AIS Service 1 year subscription$19.49
NavNet
No in-app purchases









