Tackpolar: Sail Performance

Tackpolar: Sail Performance is a focused, fully on-device app. Offline sail-performance lab for imported or entered polar targets, true/apparent wind, VMG/VMC, tack and gybe comparison, performance percentages, and race-review notes. KEY FEATURES - Editable sailboat polars - True/apparent wind geometry - VMG and target percentage - Local session-photo evidence - Editable sample data and CSV import - Side-by-side scenario comparison - Local PDF evidence export - Fifty-three original offline reference plates ONE-TIME AND PRIVATE - One paid download; no subscription or in-app purchase - No account, advertising, analytics, tracking, or developer-operated backend - Core features and bundled content work offline - Work remains on device unless you deliberately share or export it through an Apple system interface Tackpolar is a performance-planning aid, not a navigation, weather, routing, or collision-avoidance instrument. Use official charts, forecasts, rules, and approved marine equipment underway.