How to enable Korean on your device:
PC (Windows): Settings → Time & Language → Language → Add Korean → then press Alt+Shift to switch
iPhone: Settings → General → Keyboard → Keyboards → Add New Keyboard → Korean (2-Set) → tap 🌐 to switch

두벌식 Rules:
Consonants (자음) = left side of keyboard  |  Vowels (모음) = right side
Syllable = Initial consonant + Vowel (+ optional final consonant)
Example: 보안 (security) → ㅂ+ㅗ+ㅇ+ㅏ+ㄴ → type: q h d k s

Timer color guide:
🟢 Green = on pace  |  🟡 Yellow = a bit slow  |  🔴 Red = slow
Pace is calculated per-character so longer phrases give you more time.