Sub Tester and Frequency Generator is a free Android app developed by Infrasonic Technologies. It belongs to the Multimedia category and specifically falls under Music & Radio subcategory. This app is designed to cater to the needs of home stereos, home theaters, audio engineers, studios, theaters, PA systems, dance club speaker tests, and much more.

The app comes loaded with over 100 test tones, making it a comprehensive tool for sound testing. The app's primary feature is the subwoofer bass frequency generator, which accurately tests the subwoofer's performance. The app also includes a variety of other test tones, such as sine waves, pink noise, white noise, and more. The interface is user-friendly, making it easy to navigate and use.

Overall, Sub Tester and Frequency Generator is an excellent app for those looking for a comprehensive sound testing tool. It is free to download and is a must-have for anyone who wants to ensure that their audio systems are performing optimally.