# C vs Anchor Alert

The clearest difference is ratings volume: C at 2.3K against Anchor Alert's 12. C also leads on chart position (#104 vs unranked). Anchor Alert's advantage is update cadence (fortnightly vs every 6 weeks) and rating (4.7 vs 4.5). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. C sells 10 in-app purchases, starting at $1.99 per month and Anchor Alert sells 3 in-app purchases, starting at $15.00 per month. Whichever you choose, the download price is not the number that matters.

Anchor Alert holds the better App Store score, 4.7 against 4.5. That said, the two scores are not equally well evidenced: C has 2.3K ratings behind it against 12, 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 64% of Anchor Alert's.

C ships an update every 6 weeks, Anchor Alert fortnightly. Both last shipped on October 15, 2026.

## The numbers

| Metric | C | Anchor Alert |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (2.3K ratings)](https://appshunter.io/ios/app/c-map-boating/id967289980/reviews) | **[4.7 (12 ratings)](https://appshunter.io/ios/app/anchor-alert/id1628786449/reviews)** |
| Number of ratings | **2.3K** | 12 |
| Positive reviews | 51.0% of reviews | **64.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Fortnightly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | **#104** | — |
| Size | 169 MB | 174 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) | [PredictWind Limited](https://appshunter.io/developer/477048590) |

## 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


### Anchor Alert

[App page](https://appshunter.io/ios/app/anchor-alert/id1628786449)

Monitor your boat's position and anchor status from anywhere. Set custom alerts for real-time and forecast conditions, and access detailed marine weather forecasts. Connects to your boat's N2K network or works independently.

**Highlights:** Anchor and boat position monitoring, Customizable real-time and forecast alerts, N2K DataHub integration, PredictWind marine weather forecasts, Local anchorage knowledge and reviews, Works on and off the boat

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Anchor Pro 1 monthly | $15.00 | per month |
| Anchor Pro 3 monthly | $29.00 | per 3 months |
| Anchor Pro Yearly | $99.00 | per year |


## Frequently asked questions

### Is C free?

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

### Is Anchor Alert free?

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

### Which has better reviews, C or Anchor Alert?

Anchor Alert is rated higher. C averages 4.5 out of 5 from 2.3K ratings, while Anchor Alert averages 4.7 from 12 ratings.

### Do C or Anchor Alert have ads?

Neither C nor Anchor Alert shows ads.

### Which is updated more often, C or Anchor Alert?

C ships an update every 6 weeks, and Anchor Alert fortnightly. Most recently, C was updated on October 15, 2026 and Anchor Alert on October 15, 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.*