Comparison

Wärtsilä iSailor vs NavNet

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Electronic chart display
  • GPS and AIS integration
  • Route creation and monitoring
  • Weather and tide information
  • Chart correction service
  • User object sharing
Features
Read full description

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

About

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.

Highlights
  • Remote navigation data viewing
  • Fish finder image streaming
  • iOS device connectivity
  • Works with NavNet TZtouch series
Features
Read full description

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

Wärtsilä iSailor4 screens
NavNet2 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard7 real differences · 3 level
Wärtsilä iSailor versus NavNet: the parameters behind the verdict, then further details
ParameterWärtsilä iSailorNavNet
PriceFreeFree
Rating3.3 (12 ratings) — better2.8 (4 ratings)
Positive reviews44.8% of reviews — better33.3% of reviews
Number of ratings12 — better4
Update frequencyEvery 3 weeks — betterEvery 5 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad, iPod
Requires iOS138.0 — better
Further details — not scored
Size55 MB20 MB
Age rating4+4+
DeveloperWartsila Voyage Sweden AB株式会社フルノソフテック

Customer experience

Wärtsilä iSailor

All ratings11 ratings
Positive45.5%
Neutral9.1%
Negative45.5%
Written reviews873 reviews
Positive44.8%
Neutral6.9%
Negative48.3%

NavNet

All ratings4 ratings
Positive25.0%
Neutral25.0%
Negative50.0%
Written reviews6 reviews
Positive33.3%
Neutral16.7%
Negative50.0%

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

13 purchases

Wärtsilä iSailor

Subscriptions10
  • 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
Show 7 more
  • 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
One-time3
  • AIS Receiver Support$11.99
  • Tides & Currents subscription$11.99
  • Internet AIS Service 1 year subscription$19.49
None

NavNet

No in-app purchases

Questions

Is Wärtsilä iSailor free?
Wärtsilä iSailor is free to download, with in-app purchases available.
Is NavNet free?
NavNet is free to download, with no in-app purchases.
Which has better reviews, Wärtsilä iSailor or NavNet?
Wärtsilä iSailor is rated higher. Wärtsilä iSailor averages 3.3 out of 5 from 12 ratings, while NavNet averages 2.8 from 4 ratings.
Do Wärtsilä iSailor or NavNet have ads?
Neither Wärtsilä iSailor nor NavNet shows ads.
Which is updated more often, Wärtsilä iSailor or NavNet?
Wärtsilä iSailor ships an update every 3 weeks, and NavNet every 5 months. Most recently, Wärtsilä iSailor was updated on October 29, 2026 and NavNet on October 24, 2026.

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