# TVMDC Sailing & Marine Navigation Calculator vs Radar Plotting

The clearest difference is review sentiment: TVMDC Sailing & Marine Navigation Calculator at 100% against Radar Plotting's 50%. TVMDC Sailing & Marine Navigation Calculator also leads on price ($4.99 vs $7.99) and iOS requirement (8.2 vs 15.0). Radar Plotting's advantage is rating (5.0 vs 3.0). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

TVMDC Sailing & Marine Navigation Calculator costs $4.99 and Radar Plotting $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Radar Plotting holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews complicate that: 100% of TVMDC Sailing & Marine Navigation Calculator's written reviews are positive against 50% of Radar Plotting's, so the app with the better star average is not the one people write more warmly about.

TVMDC Sailing & Marine Navigation Calculator ships an update every 6 months, Radar Plotting every 5 months. Both last shipped on November 11, 2026.

## The numbers

| Metric | TVMDC Sailing & Marine Navigation Calculator | Radar Plotting |
| --- | --- | --- |
| Price | **$4.99** | $7.99 |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/tvmdc-sailing-and-marine-navigation-calculator/id981722780/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/radar-plotting/id1470598201/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | **100.0% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 5 months** |
| Monetization | Paid | Paid |
| Size | 13 MB | 17 MB |
| Requires iOS | **8.2** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [peter hopper](https://appshunter.io/developer/981722779) | [Giacomo Gabriele](https://appshunter.io/developer/1455745031) |

## What reviewers say

### TVMDC Sailing & Marine Navigation Calculator

[App page](https://appshunter.io/ios/app/tvmdc-sailing-and-marine-navigation-calculator/id981722780)

This app calculates corrections between true, magnetic, and compass bearings. It also computes set and drift from known fixes and determines the course to steer, factoring in all navigational corrections. Ideal for learning chart navigation.

**Highlights:** TVMDC corrections (True, Magnetic, Compass), Set & Drift calculations from two fixes, Course to Steer (CTS) calculation, Variation and Deviation corrections, Graphical sailing triangle

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

**In-app purchases:** none


### Radar Plotting

[App page](https://appshunter.io/ios/app/radar-plotting/id1470598201)

This app offers advanced radar plotting for maritime navigation. It allows users to calculate critical encounter data, plan maneuvers, and analyze complex scenarios with interactive visualizations. Designed for training and decision support, it aids in understanding vessel interactions.

**Highlights:** Kinematic calculations (CPA/TCPA, aspect), True and relative speed estimation, Evasive maneuver planning with COLREG guidance, Rescue and escape scenario planning, Double-target analysis, Current and drift estimation, Interactive radar canvas with playback

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

**In-app purchases:** none


## Frequently asked questions

### Is TVMDC Sailing & Marine Navigation Calculator free?

TVMDC Sailing & Marine Navigation Calculator costs $4.99, with no in-app purchases.

### Is Radar Plotting free?

Radar Plotting costs $7.99, with no in-app purchases.

### Which has better reviews, TVMDC Sailing & Marine Navigation Calculator or Radar Plotting?

Radar Plotting is rated higher. TVMDC Sailing & Marine Navigation Calculator averages 3.0 out of 5 from 2 ratings, while Radar Plotting averages 5.0 from 1 ratings.

### Do TVMDC Sailing & Marine Navigation Calculator or Radar Plotting have ads?

Neither TVMDC Sailing & Marine Navigation Calculator nor Radar Plotting shows ads.

### Which is updated more often, TVMDC Sailing & Marine Navigation Calculator or Radar Plotting?

TVMDC Sailing & Marine Navigation Calculator ships an update every 6 months, and Radar Plotting every 5 months. Most recently, TVMDC Sailing & Marine Navigation Calculator was updated on November 11, 2026 and Radar Plotting on November 11, 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.*