# C vs Taider

The clearest difference is monetization model: Taider at free against C's free with in-app purchases. Taider also leads on iOS requirement (11.4 vs 15.1). C's advantage is chart position (#108 vs unranked). On price, review sentiment, update cadence and ads there is nothing between them.

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

C ships an update every 6 weeks, Taider every 2 months. The most recent releases landed on October 17, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | C | Taider |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2.3K ratings)](https://appshunter.io/ios/app/c-map-boating/id967289980/reviews)** | — |
| Number of ratings | **2.3K** | — |
| Positive reviews | **51.0% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#108** | — |
| Size | 169 MB | 17 MB |
| Requires iOS | 15.1 | **11.4** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Navico Norway AS](https://appshunter.io/developer/842162153) | [Navcart sp. z o.o.](https://appshunter.io/developer/1451399415) |

## What reviewers say

### 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


### Taider

[App page](https://appshunter.io/ios/app/taider/id1451399416)

Navigate the Masurian Lakes with detailed nautical charts. Discover depth, hazards, port information, and record your routes. Offers collision alerts and route planning tools for a safer and more enjoyable sailing experience.

**Highlights:** Detailed nautical charts of Masurian Lakes, Depth, shallows, and underwater rock information, Port layouts, prices, and moorage spots, Collision alert system, Route recording and replay, Distance measurement and route planning

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Access for 365 days (promo) | $0.99 | one-time |
| Access for 365 days (promo) | $3.99 | one-time |
| Access for 365 days (promo) | $7.99 | one-time |
| Access for 7 days | $9.99 | one-time |
| Access for 365 days (promo) | $12.99 | one-time |
| Access for 365 days (promo) | $14.99 | one-time |
| Access for 365 days (promo) | $16.99 | one-time |
| Access for 14 days | $17.99 | one-time |
| Access for 365 days (promo) | $20.99 | one-time |
| Access for 365 days (promo) | $24.99 | one-time |


## Frequently asked questions

### Is C free?

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

### Is Taider free?

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

### Do C or Taider have ads?

Neither C nor Taider shows ads.

### Which is updated more often, C or Taider?

C ships an update every 6 weeks, and Taider every 2 months. Most recently, C was updated on October 17, 2026 and Taider on October 9, 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.*