Diamond Coin Strike

Diamond Coin Strike is an offline 📴 sail-trim laboratory built around one question: how fast ⚡ could this boat actually go? Every leg of sailing has a true wind, a heading, and a sea state, and your boat's own polar diagram 📊 says what speed is possible at that angle. Your job is to close the gap between what's possible and what you actually achieve by trimming eight real controls until the wind triangle and the numbers 🔢 agree.

Work through five seeded passages made up of twenty-four real legs, each with its own wind and sea conditions. Sail six different boats, each with a distinct polar profile, then open the polar atlas to compare ⚖️ target 🎯 speed ⚡ against true wind angle and see 👀 how your trims stack up against your own history. Tune each boat's rig in a dedicated editor that reshapes its whole performance curve.

When you're not on the water, work through a twelve-topic almanac covering points of sail and trim technique, and keep a running log 📝 of every solved trim with notes and a quick photo 📸 of the conditions. Everything you build 🔨 - custom boats, rig setups, notes - is saved on your device 📱 and picked up right where you left off.

FEATURES
- Wind-triangle instrument showing true wind, boat vector, and apparent wind live
- Eight-control trim panel scored against a real polar-speed ⚡ model
- Five passages across twenty-four authored legs
- Six boats with individually tunable rig setups
- Polar atlas with drag ✋-to-scrub target 🎯-speed ⚡ chart 📊 and a ghost overlay of your best runs
- Twelve-topic sailing almanac with diagrams
- Trim log 📝 with score 🔢 history ⏳ and notes
- Attach a photo 📸 of the conditions to any logged trim

SCREENS
Main Menu, Passages, Passage Detail, Trim Lab, Fleet, Boat Detail, Rig Tuning, Almanac, Almanac Entry, Log 📝, Settings

CAMERA & GALLERY 📷
Attach a photo 📸 of the conditions - taken with the camera 📷 or picked from your gallery 🖼️ - to any trim you log 📝, so your history carries a visual record alongside the numbers.

TECHNICAL
Platforms: Android, iOS (Kotlin Multiplatform + Compose Multiplatform)
Package: io.sofimob.btcc.pass
Data: on device 📱 only - no account, no server

Diamond Coin Strike — tune your boat, master the wind, chase your perfect trim.