PulseKey is a fast song key detector and tuner built for musicians, producers, DJs, and anyone who needs a clear answer while music is playing. Tap Listen and PulseKey analyzes audio through your iPhone microphone. Use Key mode to detect the harmonic center of a song, loop, sample, or live performance. Switch to Note mode when you need a precise tuner with note, frequency, and cents readouts. PulseKey is made for quick decisions in real musical situations: finding the key before mixing, checking a sample before producing, tuning guitar or ukulele, dialing in bass, checking violin or mandolin pitch, or identifying notes while practicing. Features: • One-tap song key detection • Microphone-based listening • Audio file loading • Key Harmony mode for songs, loops, and samples • Single Note mode for pitch detection • Cents and Hz readouts for tuning • Chromatic, guitar, bass, ukulele, violin, and mandolin presets • Open Key support for DJ-friendly harmonic mixing • Clean visual analyzer for note strength and confidence • On-device audio analysis • No account required PulseKey keeps the workflow simple: listen, analyze, decide. No menus before the answer. No clutter. Just the key, pitch, and tuning information you need.