# C vs Sign & Glide

The clearest difference is in-app purchases: Sign & Glide at none against C's 10. Sign & Glide also leads on rating (5.0 vs 4.5). C's advantage is ratings volume (2.4K vs 1) and chart position (#129 vs unranked). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. C sells 9 in-app purchases, starting at $1.99 per month. Sign & Glide asks for nothing beyond the download.

Sign & Glide holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: C has 2.4K ratings behind it against 1, so its average is the more settled of the two.

C ships an update every 6 weeks, Sign & Glide every 2 months. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | C | Sign & Glide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (2.4K ratings)](https://appshunter.io/ios/app/c-map-boating/id967289980/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sign-and-glide/id6756632140/reviews)** |
| Number of ratings | **2.4K** | 1 |
| Positive reviews | 51.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#129** | — |
| Size | 169 MB | 33 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Navico Norway AS](https://appshunter.io/developer/842162153) | [Compass Marine Services Inc](https://appshunter.io/developer/1196614725) |

## What reviewers say

### C

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

**Currently charting:** #129 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 (9)**

| 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 |
| 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


### Sign & Glide

[App page](https://appshunter.io/ios/app/sign-and-glide/id6756632140)

This app provides 24/7 on-water towing and assistance for registered vessels for a flat annual fee. Enjoy unlimited towing coverage without hidden membership costs or extra charges.

**Highlights:** 24/7 emergency dispatch, Unlimited on-water towing, Flat annual fee, No membership fees, Affordable towing services

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is C free?

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

### Is Sign & Glide free?

Sign & Glide is free to download, with no in-app purchases.

### Which has better reviews, C or Sign & Glide?

Sign & Glide is rated higher. C averages 4.5 out of 5 from 2.4K ratings, while Sign & Glide averages 5.0 from 1 ratings.

### Do C or Sign & Glide have ads?

Neither C nor Sign & Glide shows ads.

### Which is updated more often, C or Sign & Glide?

C ships an update every 6 weeks, and Sign & Glide every 2 months. Most recently, C was updated on November 6, 2026 and Sign & Glide on November 5, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*