# C vs Loisto Mariner

The clearest difference is chart position: C at #131 against Loisto Mariner's unranked. Loisto Mariner's advantage is iOS requirement (11.0 vs 15.1). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. C sells 9 in-app purchases, starting at $1.99 per month and Loisto Mariner sells 1 in-app purchase, starting at $29.99 per year. Whichever you choose, the download price is not the number that matters.

C ships an update every 6 weeks, Loisto Mariner every 2 months. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | C | Loisto Mariner |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2.4K ratings)](https://appshunter.io/ios/app/c-map-boating/id967289980/reviews)** | — |
| Number of ratings | **2.4K** | — |
| Positive reviews | 51.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Best chart rank | **#131** | — |
| Size | 169 MB | 93 MB |
| Requires iOS | 15.1 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Navico Norway AS](https://appshunter.io/developer/842162153) | [Tapio Palvelut Oy](https://appshunter.io/developer/773023495) |

## What reviewers say

### C

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

**Currently charting:** #131 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


### Loisto Mariner

[App page](https://appshunter.io/ios/app/loisto-mariner/id1192628936)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Loisto Mariner | $29.99 | per year |


## Frequently asked questions

### Is C free?

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

### Is Loisto Mariner free?

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

### Do C or Loisto Mariner have ads?

Neither C nor Loisto Mariner shows ads.

### Which is updated more often, C or Loisto Mariner?

C ships an update every 6 weeks, and Loisto Mariner every 2 months. Most recently, C was updated on November 6, 2026 and Loisto Mariner on November 2, 2026.

---

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