I must say that I am a recent PPL and there was very little to cover the use of GPS and apps such as skydemon, but I wish there was.
I wish more PPLs would realise that having a licence does not stop you from talking to instructors and asking for extra lessons in anything you may or may not have covered, some schools/clubs offer a "beyond the PPL" course of various types but if this is the case or not a decent instructor will be more than happy to do any training like this.