# OpenSeaMap vs Marine Navigation Lite

The clearest difference is ads: OpenSeaMap at none against Marine Navigation Lite's shown. OpenSeaMap also leads on review sentiment (38% vs 3%). Marine Navigation Lite's advantage is update cadence (weekly vs every 2 months) and iOS requirement (16.0 vs 18.6). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. OpenSeaMap sells 1 one-off in-app purchase and Marine Navigation Lite sells 10 in-app purchases, starting at $0.99 per 6 months. Whichever you choose, the download price is not the number that matters.

OpenSeaMap ships an update every 2 months, Marine Navigation Lite weekly. The most recent releases landed on September 21, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | OpenSeaMap | Marine Navigation Lite |
| --- | --- | --- |
| 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** | 3.4% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 13 MB | 106 MB |
| Requires iOS | 18.6 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [appdoctors UG](https://appshunter.io/developer/961029450) | [Marco Palaferri](https://appshunter.io/developer/395030821) |

## 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 |


### Marine Navigation Lite

[App page](https://appshunter.io/ios/app/marine-navigation-lite/id609276931)

This app offers offline GPS charting for marine use, allowing users to own their maps permanently. It provides advanced navigation tools, custom map creation from any image, and respects user privacy by not tracking or selling data.

**Highlights:** Lifetime map ownership, Offline GPS charting, Custom map creation from images, Global offline tides, Fish forecast, Advanced visual waypoints

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads SixMonths | $0.99 | per 6 months |
| Monthly Subscription | $0.99 | per month |
| Remove Ads (1 Year) | $1.49 | per year |
| 6 Months  Subscription | $4.49 | per 6 months |
| Update to Full Version 6Months | $4.99 | per 6 months |
| Pro | $5.99 | per year |
| Update to Full Version 1 Year | $6.99 | per year |
| 1 Year Subscription | $7.99 | per year |
| Remove Ads Forever | $2.99 | one-time |
| Full Version Forever | $19.99 | one-time |


## Frequently asked questions

### Is OpenSeaMap free?

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

### Is Marine Navigation Lite free?

Marine Navigation Lite is free to download, with in-app purchases available.

### Do OpenSeaMap or Marine Navigation Lite have ads?

Marine Navigation Lite shows ads; OpenSeaMap does not.

### Which is updated more often, OpenSeaMap or Marine Navigation Lite?

OpenSeaMap ships an update every 2 months, and Marine Navigation Lite weekly. Most recently, OpenSeaMap was updated on September 21, 2026 and Marine Navigation Lite on September 25, 2026.

---

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