# Reef Guide — When to Reef — Reef for gusts, not the lull

> Reef for gusts, not the lull (iPhone/iPad app by EVREN YUCEBAS.)

- Source: https://appshunter.io/ios/app/reef-guide-when-to-reef/id6796477098 (this page in markdown: same URL + `.md`)
- Developer: [EVREN YUCEBAS](https://appshunter.io/developer/6782353474)
- Category: Navigation, Weather
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.4 · 37 MB
- Languages: American English
- Released: 2026-08-23
- Data updated: 2026-08-27
- User reviews in markdown: https://appshunter.io/ios/app/reef-guide-when-to-reef/id6796477098/reviews.md

## What is Reef Guide?

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.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Reef Guide Pro | $4.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-08-24

No release notes.

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All apps by EVREN YUCEBAS: https://appshunter.io/developer/6782353474

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*