# SeaNav NP vs Nautical Calculator Pro

The clearest difference is price: Nautical Calculator Pro at $8.99 against SeaNav NP's $27.99. Nautical Calculator Pro also leads on rating (5.0 vs 2.7) and in-app purchases (none vs 10). SeaNav NP's advantage is iOS requirement (11.0 vs 15.0). On ratings volume, ads and device support there is nothing between them.

SeaNav NP costs $27.99 and Nautical Calculator Pro $8.99 up front. SeaNav NP sells 10 in-app purchases, starting at $5.49 per year. Nautical Calculator Pro asks for nothing beyond the download.

Nautical Calculator Pro holds the better App Store score, 5.0 against 2.7. Both are backed by a comparable volume of ratings — 3 and 3 respectively.

SeaNav NP ships an update every 7 months, Nautical Calculator Pro every 2 months. Both last shipped on November 2, 2026.

## The numbers

| Metric | SeaNav NP | Nautical Calculator Pro |
| --- | --- | --- |
| Price | $27.99 | **$8.99** |
| Rating | [2.7 (3 ratings)](https://appshunter.io/ios/app/seanav-np/id1209754367/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/nautical-calculator-pro/id1455851003/reviews)** |
| Number of ratings | 3 | 3 |
| Positive reviews | — | 60.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 months** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 63 MB | 27 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pocket Mariner Ltd.](https://appshunter.io/developer/719592131) | [Giacomo Gabriele](https://appshunter.io/developer/1455745031) |

## What reviewers say

### SeaNav NP

[App page](https://appshunter.io/ios/app/seanav-np/id1209754367)

This app offers real-time maritime navigation with high-resolution digital charts and powerful route planning. It includes free navigation tools, offline chart support, and weather information. Advanced features like live AIS and augmented reality views are available via in-app purchases.

**Highlights:** Real-time navigation, High-resolution digital charts, Route planning and tracking, Offline chart support, Live AIS and AR views (IAP), Weather, tide, and sun/moon times, Apple Watch app

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Wind and Waves | $5.49 | per year |
| Pro Features | $14.49 | per year |
| New Zealand Charts | $16.99 | per year |
| Portuguese Charts | $19.99 | per year |
| US & Great Lakes | $24.99 | per year |
| Norwegian Charts | $24.99 | per year |
| UK & IE Charts | $25.99 | per year |
| Spanish Charts | $26.99 | per year |
| French Charts (N & W) | $29.99 | per year |
| Canadian Charts | $30.99 | per year |


### Nautical Calculator Pro

[App page](https://appshunter.io/ios/app/nautical-calculator-pro/id1455851003)

This app provides comprehensive tools for solving complex nautical navigation calculations, including route planning, celestial navigation, and tidal predictions. It features a world map for route visualization and offline functionality for map display.

**Highlights:** Route calculation, Point on Rhumb Line/Great Circle, Celestial navigation, Tidal calculations, Wind calculation, Nautical almanac, World map visualization

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

**In-app purchases:** none


## Frequently asked questions

### Is SeaNav NP free?

SeaNav NP costs $27.99, and also offers in-app purchases.

### Is Nautical Calculator Pro free?

Nautical Calculator Pro costs $8.99, with no in-app purchases.

### Which has better reviews, SeaNav NP or Nautical Calculator Pro?

Nautical Calculator Pro is rated higher. SeaNav NP averages 2.7 out of 5 from 3 ratings, while Nautical Calculator Pro averages 5.0 from 3 ratings.

### Do SeaNav NP or Nautical Calculator Pro have ads?

Neither SeaNav NP nor Nautical Calculator Pro shows ads.

### Which is updated more often, SeaNav NP or Nautical Calculator Pro?

SeaNav NP ships an update every 7 months, and Nautical Calculator Pro every 2 months. Most recently, SeaNav NP was updated on November 2, 2026 and Nautical Calculator Pro on November 2, 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.*