TackMath
An upwind sailing calculator
Free · Designed for iPad. Not verified for macOS.
Come out of your next tack ready to lock in on your new heading!
Tack Math is an upwind sailing computer. Lay it flat on the deck of your sailboat, pointing toward the bow, and set the angle to your boat's highest angle of attack upwind (as close hauled as you can get). The app will sense your tack based on the heel of the boat, and plot your heading post-tack. As you come about, you can watch the binnacle (or working compass on the app), and align to the green bearing shown before you tack. (It also lets you take a bearing before you tack of your new heading, by following the green dashed line of sight on the screen. The app also returns heel angle and speed in knots. Offers night mode in red as well.
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The developer, RICHARD CAMPBELL CASE, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- RICHARD CAMPBELL CASE
- Size
- 678.9 KB
- Category
- Sports
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026