Best OBDII app for a Vauxhall

[BlackG7R]

Hi guys, my nephew is having trouble with his Vauxhall Corsa, engine stuttering / juddering. Sounds like possibly fuel starvation or dirty fuel.

He's saying the engine light is showing, and strangely enough it sounds like an ESC light as well (a bit surprised it even has ESC on a 1.2 2014 Corsa)

I have a BAFX bluetooth scan tool, but I wonder what you guys thought would be the best Android app to use for a Vauxhall, I want to see if I can get some error codes off it to maybe point a mechanic in the right direction.

Any help much appreciated !!