This driver allows other SDR applications to communicate with the SDRplay RSP receivers over USB. Your Android device must support USB host mode. You will need a USB OTG cable to connect your RSP to the Android device.
You can get more information about SDRplay RSP on their website http://www.sdrplay.com
The developer of this app is not affiliated with SDRplay. This app packages the Android drivers publicly available on the SDRplay website with permission of the copyright holders.