Gesture Synth is a motion-controlled music sketchpad for iPhone and iPad. Choose a musical scale and use hand gestures to play chords that stay within its notes, making it easier to explore melodic ideas without a traditional instrument. Add vocals to make a cover, then record the performance with its synthesized sound and singing in a video ready to share. It can suit casual experimentation as well as musicians looking for a quick way to capture an idea away from a keyboard. The US App Store lists the app as free and shows no in-app purchase pricing. It requires iOS 26 or later, and the developer’s privacy label reports possible collection of device identifiers, usage data, and crash diagnostics for analytics.
