# C vs TZ iBoat

C and TZ iBoat both sit at 4.5 stars, but that hides the real split: 80% of TZ iBoat's written reviews are positive against 51% of C's. TZ iBoat also leads on update cadence (every 8 days vs every 6 weeks). On price, rating, ratings volume 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 TZ iBoat sells 13 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.5 for C against 4.6 for TZ iBoat. Both are backed by a comparable volume of ratings — 2.4K and 885 respectively. Written reviews are what separate them: 51% of C's written reviews are positive against 80% of TZ iBoat's.

C ships an update every 6 weeks, TZ iBoat every 8 days. Both last shipped on October 29, 2026.

## The numbers

| Metric | C | TZ iBoat |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (2.4K ratings)](https://appshunter.io/ios/app/c-map-boating/id967289980/reviews) | **[4.6 (885 ratings)](https://appshunter.io/ios/app/tz-iboat-marine-navigation/id1312769833/reviews)** |
| Number of ratings | **2.4K** | 885 |
| Positive reviews | 51.0% of reviews | **79.6% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 8 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | #90 | **#85** |
| Size | 169 MB | 428 MB |
| Requires iOS | 15.1 | **14.2** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Navico Norway AS](https://appshunter.io/developer/842162153) | [Nobeltec, Inc.](https://appshunter.io/developer/1312769832) |

## What reviewers say

### C

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

**Currently charting:** #90 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


### TZ iBoat

[App page](https://appshunter.io/ios/app/tz-iboat-marine-navigation/id1312769833)

**Currently charting:** #85 Top Grossing · Navigation (US App Store)

Navigate the seas with advanced marine charts, GPS, and AIS data, even offline. This app offers detailed bathymetry, community-contributed map data, and dynamic features for safe boating, sailing, and fishing.

**Highlights:** Offline marine charts, GPS and route planning, AIS Online tracking, Community map contributions, Dynamic mooring and lighting, Advanced fishing tools, Tides and tidal currents

**Features:** Vision Pro support

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Essential Subscription | $2.99 | per month |
| Premium Subscription | $9.99 | per month |
| Great Lakes | $19.99 | per year |
| Canada East and North | $19.99 | per year |
| Canada West | $19.99 | per year |
| USA | $19.99 | per year |
| Bahamas | $30.99 | per year |
| Central America & Caribbean | $30.99 | per year |
| Elite Subscription | $39.99 | per month |
| Western Mediterranean | $40.99 | per year |
| Eastern Mediterranean | $61.99 | per year |
| AIS module | $8.99 | one-time |
| Radar module | $49.99 | one-time |

**What reviewers like**

- 🚀 Easy to use
- 🚀 Accurate charts
- 🚀 Useful features (weather, tides, currents, etc.)
- 🚀 Good integration with Furuno radar and AIS
- 🚀 Seamless cloud sync between devices

**What reviewers complain about**

- 🐛 Occasional crashes or freezing
- 🐛 Inaccurate or outdated charts in some areas
- 🐛 Anchor alarm not loud enough
- 🐛 Difficulty importing/managing routes and waypoints
- 🔋 Battery drain on mobile devices

**Reported bugs**

- GPS position not updating reliably while moving
- Radar overlay not functioning properly
- Compatibility issues with older devices or iOS versions

**Requested features**

- Automatic routing and trip planning
- Improved satellite imagery and overlays
- Better integration with other marine electronics
- More customization options for data displays
- Ability to mirror camera feeds as a rear-view


## Frequently asked questions

### Is C free?

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

### Is TZ iBoat free?

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

### Which has better reviews, C or TZ iBoat?

TZ iBoat is rated higher. C averages 4.5 out of 5 from 2.4K ratings, while TZ iBoat averages 4.6 from 885 ratings.

### Do C or TZ iBoat have ads?

Neither C nor TZ iBoat shows ads.

### Which is updated more often, C or TZ iBoat?

C ships an update every 6 weeks, and TZ iBoat every 8 days. Most recently, C was updated on October 29, 2026 and TZ iBoat on October 29, 2026.

### Which is more popular, C or TZ iBoat?

C currently peaks at #90 in the App Store charts, and TZ iBoat at #85. Chart position reflects recent download velocity rather than total install base.

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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.*