A full 88-key piano app that brings you realistic grand piano sound, smoothly moving and zooming, customizable key labels, and professional tuning & transposition functionalities. Note: We can't reply or contact you in reviews. If any problem or question, please contact realpiano@cookieapps.com and We'll help resolve as soon as possible. Features: - Realistic sound from grand piano, guitar, bass, harp, marimba, and music box.- Full 88-key keyboard: smoothly move and zoom the keyboard by just sliding and pinching.- Dynamic expression control: Position-based or Tap force. - Single or dual keyboard layout support.- Customizable key labels in different types: C-D-E, c1-d1-e1, 1-2-3, or do-re-mi. - Tuning by adjust the standard A frequency, ranging from 435Hz to 446Hz.- Transposing if playing in higher or lower key is easier.