# Wärtsilä iSailor vs NavNet

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 chart position (#160 vs unranked). 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.

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.

## The numbers

| Metric | Wärtsilä iSailor | NavNet |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.3 (12 ratings)](https://appshunter.io/ios/app/wartsila-isailor/id398456162/reviews)** | [2.8 (4 ratings)](https://appshunter.io/ios/app/navnet-viewer/id502473092/reviews) |
| Number of ratings | **12** | 4 |
| Positive reviews | **44.8% of reviews** | 33.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 months |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#160** | — |
| Size | 55 MB | 20 MB |
| Requires iOS | 13 | **8.0** |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Wartsila Voyage Sweden AB](https://appshunter.io/developer/398456165) | [株式会社フルノソフテック](https://appshunter.io/developer/1015812767) |

## What reviewers say

### Wärtsilä iSailor

[App page](https://appshunter.io/ios/app/wartsila-isailor/id398456162)

**Currently charting:** #160 Top Grossing · Navigation (US App Store)

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:** Apple Watch app

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| USA. Pacific Coast. CA | $4.99 | per year |
| USA. Ri to the Canadian border | $4.99 | per year |
| USA.  Nantucket to Cap May, NJ | $4.99 | per year |
| USA.Chesapeake & Delaware bays | $4.99 | per year |
| USA. Norfolk to Jacksonville | $4.99 | per year |
| USA. Atlantic Coast. Florida | $4.99 | per year |
| USA. Gulf Coast. Florida | $4.99 | per year |
| USA. Pacific Coast. WA | $4.99 | per year |
| The Bahamas | $10.49 | per year |
| Caribbean Sea. Lesser Antilles | $10.99 | per year |
| AIS Receiver Support | $11.99 | one-time |
| Tides & Currents subscription | $11.99 | one-time |
| Internet AIS Service 1 year subscription | $19.49 | one-time |

**What reviewers like**

- ✨ Excellent app for navigation
- 🗺️ Accurate and detailed charts
- 💰 Good value for money
- 🛳️ Reliable for offshore sailing
- 🔍 Helpful features like anchor alarm

**What reviewers complain about**

- 🐛 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

**Reported bugs**

- 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**

- 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

[App page](https://appshunter.io/ios/app/navnet-viewer/id502473092)

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:** macOS Compatibility

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*