# AIS Radar vs C

The clearest difference is review sentiment: AIS Radar at 100% against C's 51%. AIS Radar also leads on in-app purchases (none vs 11) and iOS requirement (12.0 vs 15.1). C's advantage is price (Free vs $6.99) and rating (4.5 vs 4.0). On ads and device support there is nothing between them.

C is free to download; AIS Radar costs $6.99 up front. C sells 10 in-app purchases, starting at $1.99 per month. AIS Radar asks for nothing beyond the download.

C holds the better App Store score, 4.5 against 4.0. 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 complicate that: 100% of AIS Radar's written reviews are positive against 51% of C's, so the app with the better star average is not the one people write more warmly about.

AIS Radar ships an update every 7 months, C every 6 weeks. The most recent releases landed on September 10, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | AIS Radar | C |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/ais-radar/id425345530/reviews) | **[4.5 (2.3K ratings)](https://appshunter.io/ios/app/c-map-boating/id967289980/reviews)** |
| Number of ratings | 1 | **2.3K** |
| Positive reviews | **100.0% of reviews** | 51.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 6 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Best chart rank | — | **#108** |
| Size | 3 MB | 169 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Guenter Obiltschnig](https://appshunter.io/developer/425345533) | [Navico Norway AS](https://appshunter.io/developer/842162153) |

## What reviewers say

### AIS Radar

[App page](https://appshunter.io/ios/app/ais-radar/id425345530)

View Automatic Identification System (AIS) data from marine transponders or public internet feeds. Displays target information, calculates closest point of approach, and offers customizable radar views. Requires an AIS device or adapter for WiFi connectivity.

**Highlights:** Radar PPI-like display of AIS targets, Calculates CPA and TCPA, CPA/TCPA warning system, Selectable display range, Different radar display modes, List and detail views for targets, Viewer for AIS safety messages

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

**In-app purchases:** none


### C

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

**Currently charting:** #108 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


## Frequently asked questions

### Is AIS Radar free?

AIS Radar costs $6.99, with no in-app purchases.

### Is C free?

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

### Which has better reviews, AIS Radar or C?

C is rated higher. AIS Radar averages 4.0 out of 5 from 1 ratings, while C averages 4.5 from 2.3K ratings.

### Do AIS Radar or C have ads?

Neither AIS Radar nor C shows ads.

### Which is updated more often, AIS Radar or C?

AIS Radar ships an update every 7 months, and C every 6 weeks. Most recently, AIS Radar was updated on September 10, 2026 and C on September 26, 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.*