Ultimate Banjo Tuner is a free Android app developed by Tabs4Acoustic - Ultimate Guitar Tools. It is a simple, beautiful, and hands-free banjo tuning app that allows you to tune your five-string banjo in seconds. This app offers five different tunings, including Standard, Double C, Drop C, Modal G, and Open D, with more to come in the future.

What sets Ultimate Banjo Tuner apart from other tuning apps is its professional accuracy down to less than 1Hz precision. The interface is easy to use, and string and notes autodetection make tuning your banjo a breeze. You can also change the pitch reference frequency to anything between 420Hz and 460Hz, making it perfect for those who prefer a different frequency than the default 440Hz.

Overall, Ultimate Banjo Tuner is a great app for anyone looking for an accurate and easy-to-use banjo tuner. Whether you're a beginner or a professional, this app will help you keep your banjo in tune for better sound while playing scales and chords.