Hey guys,
Thanks for all of the valuable input!
I thought I should do an update on my findings so far...
I purchased this device
https://www.ebay.com.au/itm/ELM327-OBDII-OBD2-Bluetooth-Car-Scanner-Diagnosis-Tool-Torque-Android-IOS-iPhone/123882444242
It turned up on time and as described by the seller.
Plugged it in and turned it on (it has a manual On/Off button. Connected it via Bluetooth through the 'Car Scanner' app and so far so good. No hiccups, no issues. It read codes but I technically haven't had to clear any codes as yet.
Once again, thanks for everybody's input!
Cheers