# Marine Navigation vs app4sail

The clearest difference is price: app4sail at $4.99 against Marine Navigation's $19.99. app4sail also leads on iOS requirement (15.6 vs 18.0). Marine Navigation's advantage is update cadence (weekly vs every 3 months). On ads, in-app purchases and device support there is nothing between them.

Marine Navigation costs $19.99 and app4sail $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Marine Navigation ships an update weekly, app4sail every 3 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Marine Navigation | app4sail |
| --- | --- | --- |
| Price | $19.99 | **$4.99** |
| Positive reviews | 29.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 107 MB | 8 MB |
| Requires iOS | 18.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Marco Palaferri](https://appshunter.io/developer/395030821) | [anton van oosten](https://appshunter.io/developer/641322651) |

## What reviewers say

### Marine Navigation

[App page](https://appshunter.io/ios/app/marine-navigation/id528948720)

This app offers a one-time purchase offline GPS chartplotter, giving you lifetime ownership of your maps without subscriptions or data tracking. It provides reliable navigation for sailors and fishermen, with an optional PRO subscription for advanced features.

**Highlights:** Offline GPS chartplotter, One-time purchase, own forever, Proprietary S57 engine, Unlimited custom maps, Global offline tides, Fish forecast

**Features:** Vision Pro support

**In-app purchases:** none


### app4sail

[App page](https://appshunter.io/ios/app/app4sail/id641578574)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Marine Navigation free?

Marine Navigation costs $19.99, with no in-app purchases.

### Is app4sail free?

app4sail costs $4.99, with no in-app purchases.

### Do Marine Navigation or app4sail have ads?

Neither Marine Navigation nor app4sail shows ads.

### Which is updated more often, Marine Navigation or app4sail?

Marine Navigation ships an update weekly, and app4sail every 3 months. Most recently, Marine Navigation was updated on October 26, 2026 and app4sail 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.*