# C vs Nautical Calculator Pro

The clearest difference is price: C at Free against Nautical Calculator Pro's $8.99. C also leads on ratings volume (2.3K vs 3) and chart position (#104 vs unranked). Nautical Calculator Pro's advantage is rating (5.0 vs 4.5) and in-app purchases (none vs 11). On update cadence, ads, device support and iOS requirement there is nothing between them.

C is free to download; Nautical Calculator Pro costs $8.99 up front. C sells 10 in-app purchases, starting at $1.99 per month. Nautical Calculator Pro asks for nothing beyond the download.

Nautical Calculator Pro holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: C has 2.3K ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 51% of C's written reviews are positive against 60% of Nautical Calculator Pro's.

C ships an update every 6 weeks, Nautical Calculator Pro every 2 months. The most recent releases landed on September 23, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | C | Nautical Calculator Pro |
| --- | --- | --- |
| Price | **Free** | $8.99 |
| Rating | [4.5 (2.3K ratings)](https://appshunter.io/ios/app/c-map-boating/id967289980/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/nautical-calculator-pro/id1455851003/reviews)** |
| Number of ratings | **2.3K** | 3 |
| Positive reviews | 51.0% of reviews | **60.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | **#104** | — |
| Size | 169 MB | 27 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Navico Norway AS](https://appshunter.io/developer/842162153) | [Giacomo Gabriele](https://appshunter.io/developer/1455745031) |

## What reviewers say

### C

[App page](https://appshunter.io/ios/app/c-map-boating/id967289980)

**Currently charting:** #104 Top Grossing · Navigation (US App Store)

Access up-to-date nautical charts for global exploration and planning. Save points of interest and routes, record tracks, and view marine weather. Upgrade for offline maps, GPS, and advanced features like shaded relief and AIS.

**Highlights:** Free chart viewer, Autorouting, Personal waypoints, Track recording, Marine weather forecasts, Offline map downloads, High-resolution bathymetry

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Embark Advanced Weather | $1.99 | per month |
| Embark Offline Maps USA | $2.49 | per month |
| Annual Subscription | $14.99 | per year |
| Annual subscription | $14.99 | per year |
| Region | $18.99 | per year |
| North America | $23.49 | per year |
| Maps Lakes South East USA | $25.99 | per year |
| Annual Subscription | $29.99 | per year |
| Caribbean | $32.99 | per year |
| Maps USA East Coast & Bahamas | $39.99 | per year |

**What reviewers like**

- 🚀 Accurate maps and charts
- 👍 Easy to use and intuitive
- 📍 Helpful for planning trips and routes
- 🛳️ Useful for both professionals and beginners
- ⚙️ Detailed features like shaded relief and weather info

**What reviewers complain about**

- 🐛 Frequent crashes and freezes
- ⚠️ Unreliable GPS tracking and location updates
- 🔌 Offline maps and features not working as expected
- 🤔 Confusing or missing functionality (e.g. route editing)
- 💸 Expensive subscription, not worth the cost

**Reported bugs**

- App crashes when trying to save tracks or routes
- Offline maps fail to download or disappear
- Depth/contour data inaccurate or not displaying properly
- Login and authentication issues preventing access

**Requested features**

- Add mast height/clearance feature
- Improve AIS integration and functionality
- Allow more customization of map views and data
- Provide better customer support and communication


### 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 C free?

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

### Is Nautical Calculator Pro free?

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

### Which has better reviews, C or Nautical Calculator Pro?

Nautical Calculator Pro is rated higher. C averages 4.5 out of 5 from 2.3K ratings, while Nautical Calculator Pro averages 5.0 from 3 ratings.

### Do C or Nautical Calculator Pro have ads?

Neither C nor Nautical Calculator Pro shows ads.

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

C ships an update every 6 weeks, and Nautical Calculator Pro every 2 months. Most recently, C was updated on September 23, 2026 and Nautical Calculator Pro on September 17, 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.*