# OpenSeaMap vs KartenWerft NavGo 2.0

The clearest difference is rating: KartenWerft NavGo 2.0 at 5.0 against OpenSeaMap's 1.0. KartenWerft NavGo 2.0 also leads on review sentiment (71% vs 38%) and iOS requirement (12.0 vs 18.6). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. OpenSeaMap sells 1 one-off in-app purchase and KartenWerft NavGo 2.0 sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

KartenWerft NavGo 2.0 holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews point the same way: 38% of OpenSeaMap's written reviews are positive against 71% of KartenWerft NavGo 2.0's.

OpenSeaMap ships an update every 2 months, KartenWerft NavGo 2.0 every 5 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | OpenSeaMap | KartenWerft NavGo 2.0 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/openseamap/id495210783/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/kartenwerft-navgo-20/id1497036703/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 38.3% of reviews | **71.4% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 13 MB | 82 MB |
| Requires iOS | 18.6 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [appdoctors UG](https://appshunter.io/developer/961029450) | [KartenWerft](https://appshunter.io/developer/738498582) |

## What reviewers say

### OpenSeaMap

[App page](https://appshunter.io/ios/app/openseamap/id495210783)

This app provides a free, worldwide nautical chart with detailed sea information, including lights, weather data, and harbor details. It offers chartplotting, waypoint management, and offline map caching for navigation. Users can mark locations, enter coordinates, and adjust chart zoom for optimal viewing.

**Highlights:** Free worldwide sea chart, Chartplotting with tracking, Waypoint creation and export, Offline map caching, Mark and search locations, Adjustable chart zoom

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OpenSeaMap Professional | $1.99 | one-time |


### KartenWerft NavGo 2.0

[App page](https://appshunter.io/ios/app/kartenwerft-navgo-20/id1497036703)

This navigation app displays detailed digital nautical charts for sport boats, showing your GPS position and relevant information like depth restrictions and bridge heights. An in-app purchase unlocks advanced features such as route planning and AIS signal display.

**Highlights:** Digital nautical chart display, GPS position tracking, Nautical information overlay, AIS signal visualization, Route and waypoint planning, Measurement tools

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BINNENKARTEN ATLAS 9 | $22.99 | one-time |
| BINNENKARTEN ATLAS 11 | $22.99 | one-time |
| BINNENKARTEN ATLAS 12 | $22.99 | one-time |
| BINNENKARTEN ATLAS 2 | $22.99 | one-time |
| BINNENKARTEN ATLAS 3 | $22.99 | one-time |
| BINNENKARTEN ATLAS 4 | $22.99 | one-time |
| SEEKARTEN ATLAS DE1 | $34.99 | one-time |
| SEEKARTEN ATLAS DK1 | $34.99 | one-time |
| SEEKARTEN ATLAS DK2 | $34.99 | one-time |
| SEEKARTEN ATLAS DK3 | $34.99 | one-time |


## Frequently asked questions

### Is OpenSeaMap free?

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

### Is KartenWerft NavGo 2.0 free?

KartenWerft NavGo 2.0 is free to download, with in-app purchases available.

### Which has better reviews, OpenSeaMap or KartenWerft NavGo 2.0?

KartenWerft NavGo 2.0 is rated higher. OpenSeaMap averages 1.0 out of 5 from 1 ratings, while KartenWerft NavGo 2.0 averages 5.0 from 1 ratings.

### Do OpenSeaMap or KartenWerft NavGo 2.0 have ads?

Neither OpenSeaMap nor KartenWerft NavGo 2.0 shows ads.

### Which is updated more often, OpenSeaMap or KartenWerft NavGo 2.0?

OpenSeaMap ships an update every 2 months, and KartenWerft NavGo 2.0 every 5 weeks. Most recently, OpenSeaMap was updated on November 1, 2026 and KartenWerft NavGo 2.0 on November 3, 2026.

---

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