True Wind Pro: Wind Calculator

True Wind Pro is a precise nautical wind calculator and training tool designed for sailors, navigators, and marine students.

Convert apparent wind into true wind direction and speed using the classic nautical-school vector method — clearly visualized and easy to understand.

Key Features

• True wind direction (TWD) and speed (TWS) calculation
• Apparent wind (AWA / AWS) support
• Atmospheric pressure readings using the iPhone’s built-in barometer sensor
• Pressure history with date and time
• Easy access to pressure, wind direction, and wind force values for entering into the ship’s deck logbook on the bridge
• Interactive radar and wind triangle plot
• Step-by-step vector construction (nautical-school method)
• Reverse calculator: find heading for a target apparent wind angle
• Beaufort scale interpretation
• Clean, distraction-free interface optimized for marine use

Designed for Learning & Practice

True Wind Pro doesn’t just give you numbers — it shows how the result is constructed. Perfect for sailing schools, exam preparation, and real-world navigation planning.

The app also helps with practical bridge routines by making atmospheric pressure, wind direction, and wind force easy to check and enter into the ship’s deck logbook.

Free & Pro

You can perform 5 free calculations to try the app.
Unlock True Wind Pro – Lifetime to get unlimited calculations forever with a one-time purchase.

No subscriptions. No ads.

Ideal for sailors, skippers, students, navigators, and anyone who wants to truly understand wind mechanics at sea.