Piano Tuner PT1 enables professional piano technicians to tune a piano to the highest possible standards. With Piano Tuner PT1, you can tune all the 88 keys of piano with extreme accuracy. With over 10 years in development, Piano Tuner PT1 comes with top-class pitch recognition algorithm that lets you perform high-quality tuning of the entire range of the piano. You can never go wrong when you have Piano Tuner PT1 handy while tuning a piano. It shows the precise pitch frequency and deviation from the target frequency for any note. Piano Tuner PT1 also supports other tunings where A4 frequency is different from 440 Hz. Key Features: • Professional grade piano tuning tool for piano technicians. • Tune all 88 keys of the piano - Pitch detection works the entire range of the piano. • Supports alternate tunings - for tunings with A4 frequency is different from 440Hz in equal temperament. • Historical deviation graph - Shows the stability of the tuning. • Extremely accurate, reliable and easy to use with realtime instantaneous pitch analysis. Note: This is a professional app used by piano technicians and prior knowledge of piano tuning basics is a requirement for using this app.