Morse Code Trainer and Keyer is a practical Morse code learning and operating tool for amateur radio enthusiasts, students, and anyone interested in CW. Practice sending Morse code using responsive on-screen paddles or straight-key mode. Follow the interactive Morse code tree, adjust your sending speed, and hear clear sidetones directly through your phone. Features include: • Interactive Morse code tree • Iambic paddle and straight-key practice modes • Adjustable words-per-minute speed • Adjustable sidetone frequency and volume • Live Morse character decoding while keying • Text-to-CW conversion with Send, Pause, and Stop controls • Phone-speaker practice without radio equipment • Dark, high-contrast interface designed for mobile use • Local settings saved on your device Premium VOX Unlock adds USB audio support for compatible amateur radio equipment. When connected to a supported radio, the app can send generated CW audio through the radio’s USB audio interface while using the radio’s VOX function. The app was developed and tested with the Yaesu FT-991A. Compatibility with other radios, USB audio devices, Android phones, and adapters may vary. No account is required. Practice text and settings are processed locally on your device. Important operating note: Always verify your radio settings, transmit frequency, power level, antenna connection, and applicable amateur radio regulations before transmitting. The user is responsible for lawful and proper operation of connected radio equipment.