The OnStepper is intended to be an advantageous replacement for the basic OnStep usage programs (actually, Smart Web Server and Android App).
It is able to communicate with OnStep via WiFi or direct connection via USB. In both modes, LX200 commands are used directly, as described on the OnStep website, without the need to install ASCOM drivers, just the basic driver that Windows itself needs (CP2102 USB to UART Bridge Controller)
The OnStep is a computer controlled stepper motor goto system for telescopes with Equatorial and Alt/Az mounts.