Instant Character Recognition (ICR) & PARIS Standard
ICR trains instant mental recognition without counting dits/dahs. Under the PARIS standard (1 word = 50 dits), 1 dit duration is 1200 / WPM ms. Standard inter-character space equals 3 dits (3600 / WPM ms).
Game Modes & Dynamic Rush
Time / Time Rush ⚡: Practice for a set duration (1 to 10 minutes) and maximize score. Battle / Battle Rush ⚡: Start with 5 lives. Mistakes cost 1 life. Listen: Pure listening practice without scoring. Rush Mechanics: Starts at 2x base ICR target time. Correct answers decrease ICR target (-1ms / -2ms for streak ≥ 2 / -4ms for streak ≥ 8). Errors slow ICR target back down (+1ms / +2ms / +4ms).
Spelling Modes
Standard: Speaks single letter names (e.g. A, Be, Ce...). NATO: Speaks international phonetic alphabet (e.g. Alfa, Bravo, Charlie...). Off: Disables Text-to-Speech completely.