As most of us know, EES is to begin on Oct 12 and be gradually rolled out throughout the entire Schengen area within 6 months.
The Local Austria (an English language news site in Austria) is reporting that the Vienna Airport will start EES on Oct 12 with Salzburg starting a month later on Nov. 12.
I have not seen any dates for other airports in Schengen.
According to the Times (UK) and app will be available that will let you pre-register your details prior to arrival but you will still have to be fingerprinted your first time through after implementation. There is no cost for EES nor do you have to do anything prior to arrival. The app might make your first trip through quicker. That's all.