The app transforms an iPhone into a whistle, controllable by blowing into the microphone, shaking the device, or tapping the screen. It offers multiple whistle sounds and adjustable volume, with optional visual feedback via a mic level meter.
The app analyzes instrument sounds to find the fundamental frequency. It displays the nearest note and the difference between the played note and the target.
The app provides a blank canvas for children to paint with random brush sizes and colors. Users can set the background color, use photos as backgrounds, and access unlimited undo functionality.
