TVMDC Sailing & Marine Navigation Calculator at App Store analyse

App power index: 130 (based on ranks around App Stores today)
Navigation Education
Developer: peter hopper
Price: 0 free
Current version: 4.0, last update: 5 years ago
First release : 09 Apr 2015
App size: 13.77 Mb
4.4 ( 4304 ratings )
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Estimation application downloads and cost

> 2.86k
Monthly downloads
~ $ 1.17k
Estimation App Cost


A Simple to Use, Marine Navigation Calculator App - for Sailors and Navigators learning to use Charts.

The TVMDC App performs three functions: -
* Instant TVMDC corrections between True, Magnetic and Compass bearings.
* Set & Drift Calculations from two known Fixes.
* Calculation of "Course to Steer" (CTS) based upon a Destination while factoring in both TVMDC and Set & Drift corrections.

Allows you to move between True, Magnetic and Compass bearings instantly. A True, Variation, Magnetic, Deviation, Compass (TVMDC) Calculator.

Ideal for Sailors who are learning to Navigate with Charts.

Includes corrections for : Variation, Annual Magnetic Variation Drift, a boats Deviation, Set and Drift factors.

Simple to use: Input values form the your nearest Charts Compass Rose: including Variation and Annual Increase. Along with your boat Compasss Deviation.

The Calculator will instantly correct between any: True, Magnetic and Compass bearings.

Add two known fixes along with your boats Heading and Speed through the Water. Press Calculate and the App will display your calculated "Set and Drift" values along with a graphical sailing triangle.

Any heading or bearing is adjusted for Magnetic Variation and Deviation.

Add your Destination and the Calculator will provide your best Course to Steer: factoring in TVMDC and Set and Drift errors.

American Sailing Association (ASA) course 105 (Navigation) is an ideal back ground for the App.

Also, wikipedias TVMDC description : http://en.wikipedia.org/wiki/TVMDC

YouTube TVMDC App Introduction tutorial: https://www.youtube.com/watch?v=u4d5wCgPxwg

Extensive Help at: http://www.arintoapps.com


Runs on iPhones 5, 6 and 6+, 7, 7+ in Portrait mode ONLY.

Planning on new versions and extensions; so please feedback feature requests?
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# Term Store county Place Priority
1 charts & tides 19 ⭐️⭐️
Available in countries
Country Price
Canada 6.99 CAD
China 38 CNY
France 5.99 EUR
Germany 5.99 EUR
Italy 5.99 EUR
Netherlands 5.99 EUR
Portugal 5.99 EUR
Spain 5.99 EUR
Poland 5.49 EUR
UK 4.99 GBP
India 499 INR
Japan 700 JPY
Korea, Republic Of 6600 KRW
Poland 29.99 PLN
Russia 449 RUB
Turkey 149.99 TRY
USA 4.99 USD
Korea, Republic Of 5.49 USD
Ukraine 5.99 USD
Available for devices
iPad2Wifi, iPad23G, iPhone4S, iPadThirdGen, iPadThirdGen4G, iPhone5, iPodTouchFifthGen, iPadFourthGen, iPadFourthGen4G, iPadMini, iPadMini4G, iPhone5c, iPhone5s, iPadAir, iPadAirCellular, iPadMiniRetina, iPadMiniRetinaCellular, iPhone6, iPhone6Plus, iPadAir2, iPadAir2Cellular, iPadMini3, iPadMini3Cellular, iPodTouchSixthGen, iPhone6s, iPhone6sPlus, iPadMini4, iPadMini4Cellular, iPadPro, iPadProCellular, iPadPro97, iPadPro97Cellular, iPhoneSE, iPhone7, iPhone7Plus, iPad611, iPad612, iPad71, iPad72, iPad73, iPad74, iPhone8, iPhone8Plus, iPhoneX, iPad75, iPad76, iPhoneXS, iPhoneXSMax, iPhoneXR, iPad812, iPad834, iPad856, iPad878, iPadMini5, iPadMini5Cellular, iPadAir3, iPadAir3Cellular, iPodTouchSeventhGen, iPhone11, iPhone11Pro, iPadSeventhGen, iPadSeventhGenCellular, iPhone11ProMax, iPhoneSESecondGen, iPadProSecondGen, iPadProSecondGenCellular, iPadProFourthGen, iPadProFourthGenCellular,