# C vs Sea Maps

The clearest difference is review sentiment: Sea Maps at 100% against C's 51%. Sea Maps also leads on rating (5.0 vs 4.5). C's advantage is monetization model (free with in-app purchases vs subscription) and ratings volume (2.3K vs 1). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. C sells 10 in-app purchases, starting at $1.99 per month and Sea Maps sells 3 in-app purchases, starting at $14.99 per 3 months. Whichever you choose, the download price is not the number that matters.

Sea Maps 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 1, 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 100% of Sea Maps's.

C ships an update every 6 weeks, Sea Maps monthly. The most recent releases landed on October 15, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | C | Sea Maps |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (2.3K ratings)](https://appshunter.io/ios/app/c-map-boating/id967289980/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sea-maps/id6584526029/reviews)** |
| Number of ratings | **2.3K** | 1 |
| Positive reviews | 51.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Monthly** |
| Monetization | **Free with in-app purchases** | Subscription |
| Best chart rank | **#100** | — |
| Size | 169 MB | 106 MB |
| Requires iOS | **15.1** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Navico Norway AS](https://appshunter.io/developer/842162153) | [APP ASPIRES](https://appshunter.io/developer/1272065949) |

## What reviewers say

### C

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

**Currently charting:** #100 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


### Sea Maps

[App page](https://appshunter.io/ios/app/sea-maps/id6584526029)

This marine navigation app provides boaters with interactive maps, real-time weather overlays, and AIS vessel tracking. It offers advanced features like bathymetry, anchor alarms, and track recording for safe and informed ocean exploration.

**Highlights:** Interactive marine charts, Real-time weather overlays, AIS vessel tracking, Anchor alarm system, Track recording, Bathymetry data

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3 Months Subscription | $14.99 | per 3 months |
| 6 Month Subscription | $24.99 | per 6 months |
| 1 Year Subscription | $39.99 | per year |


## Frequently asked questions

### Is C free?

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

### Is Sea Maps free?

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

### Which has better reviews, C or Sea Maps?

Sea Maps is rated higher. C averages 4.5 out of 5 from 2.3K ratings, while Sea Maps averages 5.0 from 1 ratings.

### Do C or Sea Maps have ads?

Neither C nor Sea Maps shows ads.

### Which is updated more often, C or Sea Maps?

C ships an update every 6 weeks, and Sea Maps monthly. Most recently, C was updated on October 15, 2026 and Sea Maps on October 7, 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.*