(Not all smartphone with OTG USB are compatible)
This app works in conjunction with Ultamics to record and analyze ultrasonic bat echolocation calls (and thus can be used as a bat detector), as well as other high frequency bioacoustic signals from cetaceans, insects, and other animals.
USB Audio Tester
Simple app that checks whether the android device can recognize and use a USB sound card. Basic functionality like audio playback, recording and looping available.
The app shows all detected USB devices which were present when the app was started.
USB Audio Recorder PRO
Record and playback audio in high quality from a USB audio interface! Warning: this is not a generic driver, you can only playback and record from within this app.
Audio Evolution Mobile Studio
USB audio editor – recorder