# OpenSeaMap vs Nautigo

The clearest difference is in-app purchases: Nautigo at none against OpenSeaMap's 1. Nautigo also leads on iOS requirement (15.1 vs 18.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. OpenSeaMap sells 1 one-off in-app purchase. Nautigo asks for nothing beyond the download.

OpenSeaMap ships an update every 2 months, Nautigo monthly. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | OpenSeaMap | Nautigo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/openseamap/id495210783/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 38.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Size | 13 MB | 48 MB |
| Requires iOS | 18.6 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [appdoctors UG](https://appshunter.io/developer/961029450) | [ACCESOWEB DESIGN LTDA ME](https://appshunter.io/developer/1116746913) |

## 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 |


### Nautigo

[App page](https://appshunter.io/ios/app/nautigo/id6752305278)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is OpenSeaMap free?

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

### Is Nautigo free?

Nautigo is free to download, with no in-app purchases.

### Do OpenSeaMap or Nautigo have ads?

Neither OpenSeaMap nor Nautigo shows ads.

### Which is updated more often, OpenSeaMap or Nautigo?

OpenSeaMap ships an update every 2 months, and Nautigo monthly. Most recently, OpenSeaMap was updated on November 1, 2026 and Nautigo on October 30, 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.*