# Wärtsilä iSailor vs Ocean Tools

The clearest difference is price: Wärtsilä iSailor at Free against Ocean Tools's $39.99. Wärtsilä iSailor also leads on device support (4 vs 2) and iOS requirement (13 vs 26.0). Ocean Tools's advantage is in-app purchases (none vs 10). On update cadence and ads there is nothing between them.

Wärtsilä iSailor is free to download; Ocean Tools costs $39.99 up front. Wärtsilä iSailor sells 10 in-app purchases, starting at $4.99 per year. Ocean Tools asks for nothing beyond the download.

Wärtsilä iSailor ships an update every 3 weeks, Ocean Tools every 2 weeks. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Wärtsilä iSailor | Ocean Tools |
| --- | --- | --- |
| Price | **Free** | $39.99 |
| Rating | **[3.3 (12 ratings)](https://appshunter.io/ios/app/wartsila-isailor/id398456162/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 44.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 55 MB | 90 MB |
| Requires iOS | **13** | 26.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Wartsila Voyage Sweden AB](https://appshunter.io/developer/398456165) | [Erwin Staedler](https://appshunter.io/developer/1492895278) |

## What reviewers say

### Wärtsilä iSailor

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

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 (10)**

| 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 |
| Caribbean Sea. Lesser Antilles | $10.99 | per year |
| AIS Receiver Support | $11.99 | 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


### Ocean Tools

[App page](https://appshunter.io/ios/app/ocean-tools/id1603218515)

**In-app purchases:** none


## Frequently asked questions

### Is Wärtsilä iSailor free?

Wärtsilä iSailor is free to download, with in-app purchases available.

### Is Ocean Tools free?

Ocean Tools costs $39.99, with no in-app purchases.

### Do Wärtsilä iSailor or Ocean Tools have ads?

Neither Wärtsilä iSailor nor Ocean Tools shows ads.

### Which is updated more often, Wärtsilä iSailor or Ocean Tools?

Wärtsilä iSailor ships an update every 3 weeks, and Ocean Tools every 2 weeks. Most recently, Wärtsilä iSailor was updated on November 6, 2026 and Ocean Tools on November 3, 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.*