That's what I am looking for too because of the bloody Barclays Bank app.
I want to root my LG G3, block ads, bloatware etc and then unroot to get Barklays app working
S4min, Grand 2, Note 2 - I always rooted phones and then unrooted by uninstalling root in SuperSu app.
Is there any similar method for LG G3?
Re-flashing to unroot doesn't make sense for me cos I will loose everything I needed the root for