I dont think there is analog to OBD, I do know there is analog to BT.
Basically a device that captures analog voltage and sends it over BT, then the app developer can “read” those values.
We are actually developing such device, it will feature X amount of inputs for reading sensors like (Fuel Level, Voltage, etc), plus On/Off switches.
This will allow you to not only read sensors but also control hardware from your DMD2 app, like use the on/off switch to turn on and off lights, ignition, whatever…
Top secret stuff for now 😛