Phonal Tonal by Kelvin Sherlock is an iPhone application that allows users to generate a variety of phone tones for nostalgic, fun, and educational purposes. This utility falls under the category of Utilities & Tools and is a full version license.

Back in the day, phreaks used colored boxes to manipulate phone systems and make free calls. While those tricks no longer work, Phonal Tonal brings back the nostalgia by offering a range of phone tones. With this app, users can experience the sounds of the Blue Box, Red Box, Green Box, Special Information Tones, DTMF, and more.

Whether you're looking to relive the past, have some fun experimenting with different tones, or even learn about the history of phone phreaking, Phonal Tonal provides an enjoyable and educational experience. The app is easy to use and offers a wide range of phone tones to explore.