Reef Guide — When to Reef
Reef for gusts, not the lull
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
18 knots mean with 26 gust is a second reef, not a first. The gust is what knocks you down, and this weights for it.
Reef Guide answers the question every gust makes you ask: is it time yet?
REEF FOR THE GUSTS, NOT THE AVERAGE
Enter the mean wind and the gust. The recommendation weights toward the gust, not the average — because that is the load your rig actually feels, and a wide spread between mean and gust is exactly what a simple average hides.
NO INSTRUMENTS? READ THE BOAT
The rail buried and staying there. Steering to spill wind rather than to steer. Weather helm creeping in. Five signs that work as well as any anemometer, for the boats that do not carry one.
YOUR BOAT'S OWN CHART
Generic thresholds are a starting point, not your boat. Log the wind every time you actually reef, and this becomes a personal chart for your specific hull, rig and crew.
WORKS OFFLINE
No GPS, no account, no signal.
The generic thresholds are a starting point for a mid-size cruising monohull upwind — not your boat, your sea state, or your crew. Reef earlier in steep seas or with a tired crew. The skipper decides.
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Refreshed screenshots and minor text improvements. No changes to how the app works.
The developer, EVREN YUCEBAS, 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
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Information
- Seller
- EVREN YUCEBAS
- Size
- 37.3 MB
- Category
- Navigation
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - iPad
Requires iPadOS 16.4 or later. - Mac
Requires macOS 12.0 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+
- In-App Purchases
Yes
- Reef Guide Pro $4.99
- Copyright
- © 2026 Talor Digitals
