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True-Wind Calculator

True-Wind Calculator

Sailing wind converter & log

0 ratings
4 reviews
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Free
In-App Purchases

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Details

Released
September 28, 2013
Updated
July 1, 2026

Features

Developer

Nejc Landeker
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About

Calculate true wind direction and speed for sailing. Input vessel speed, apparent wind, and angle to determine accurate wind data.

✓True-wind calculation
✓Vessel speed input
✓Apparent wind speed input
✓Apparent wind angle input
✓Vessel heading input
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What's New in True

3.1

July 1, 2026

v3.1 — Pro performance tools for serious sailors. • New: VMG and target boat speed, calculated against your polar curve (Pro) • New: tack & layline tactics — know exactly when to tack and whether you can lay the mark (Pro) • Pro remains a one-time unlock — no subscription, ever.

More
1

Subscriptions & In-App Purchases

$4.99

Pro Unlock

Unlock all Pro features. One-time purchase.

User reviews

Most RecentHighest RatedLowest Rated

Does not work for wind on port bow

If you use relative wind of 180 or greater (ie on the port bow) the calculation seems to fail.
Kkaiwahine22

Rubbish

Calculations are false. The app is a fraud.
Sshadwah

Has flaws

Does not calculate wind direction properly. Can be off as much as 200 degrees.
Ggjmac22

Response from developer

Hi, have you checked the new version? It does much more. Hope it helps you.

Don't waste u money

It doesn't say you have to enter all the fields to then calculate the twd... hopeless
MMATDS

FAQ

What is True-Wind Calculator used for?

True-Wind Calculator helps you determine the true wind direction and speed. It uses your vessel's speed, the apparent wind speed and angle, and your vessel's heading as inputs.

How much does True-Wind Calculator cost?

True-Wind Calculator is a paid app, available for $1.99. This one-time purchase grants you access to all its features.

What devices is True-Wind Calculator available on?

True-Wind Calculator is compatible with iPhone, iPad, and iPod devices. It is designed for iOS users.

When was True-Wind Calculator last updated?

The latest version of True-Wind Calculator, version 2.2, was released on November 3, 2022. This indicates regular updates to maintain functionality.

What is the age rating for True-Wind Calculator?

True-Wind Calculator has an age rating of 4+. This means it is suitable for users of all ages, with no content restrictions.

Does True-Wind Calculator have ads?

No, True-Wind Calculator does not contain advertisements. As a paid application, it offers an ad-free experience.

Is True-Wind Calculator good for beginners?

While the app provides precise calculations, its utility is best for those familiar with sailing terminology and data inputs like vessel heading and apparent wind.