Slide Whistle is a free Android app developed by X64h. This app falls under the category of Multimedia and specifically Music & Radio. The app is basically a slide whistle or slide flute that allows the user to create music on their mobile phone.

The app offers a range of two octaves and the central frequency is set at 880Hz (A5). The user can slide up and down to change the pitch and move left to right to adjust the volume. The app works much like a Theremin and is a great way to create music on the go. The app is easy to use and offers a fun, interactive experience for anyone who loves music.

Overall, Slide Whistle is a great app for music enthusiasts and anyone looking for a unique way to make music. The app is free to use and offers a range of features that are sure to keep users engaged and entertained.