Sailing Tools: COG, SOG, Heel

Mount your phone and watch SOG, COG, heel and race timer like a mast display. Build custom screen layouts and track your sessions. Doesn't require internet connection.

This app turns your iPhone or iPad into a clear, mast-mountable racing display — large numbers, no clutter, readable in bright sun.

Built for club and keelboat racers who want real speed and heading without a full instrument install.

WHAT YOU SEE • Speed over ground (SOG) in knots • Course over ground (COG) • Heel angle • Session average speed • Race countdown timer — 3 / 5 / 10 minute starts, sync to the nearest minute, count-up after the gun.

LAYOUTS THAT FIT HOW YOU RACE • Resize and arrange instrument tiles • Save named presets (Prestart, Upwind, Downwind, or your own) • Switch layouts with one tap • Day mode for sun; dim red night mode for after dark • Choose digit fonts and high-contrast colours per instrument

AFTER THE SAIL • Start and end sessions to record your track • Review past sails on a map with speed along the track • Add race-day notes (wind and free text — notes only, not live wind instruments) • Save a simple boat profile (name, size, PHRF, ORC) • Share a track via the iOS share sheet

WORKS WHERE YOU SAIL • Fully offline while racing — no cell or Wi‑Fi required for instruments • Uses the device GPS and motion sensors • Keeps the screen awake so numbers stay visible during a race

DEVICE NOTES • iPhone: any supported iPhone with GPS • iPad: requires a cellular iPad with GPS (Wi‑Fi-only iPads without GPS are not supported) • iOS / iPadOS 17 or newer • For long races, a USB power source is recommended

SUBSCRIPTION INFORMATION

The app is free to use. No subscription needed.

Privacy Policy: https://blushing-coin-137.notion.site/Privacy-Policy-3aebf221cf7380b48471c9a1f49afa6d Terms of Service: https://blushing-coin-137.notion.site/Terms-of-Service-3aebf221cf7380da98f5ddf51cf85e42?pvs=73