A few questions after using this app....

Is 6.5 pretty much standard on all games ? Strangely enough I found all that all my games I tested are showing they are pitched too high in back (fast) which I find strange as I don't think they play like that and the leveler in game is set on the 2nd dark line on all. BUT.... I did it with the glass on... does that make a difference ?

Do you need to do the playfield first ? I don't really get why you have to do the playfield THEN the glass as instructed... why wouldn't one be enough ?

Finally, why do you need to 'learn' a particular game... neat feature but not sure why you would use this...

Thanks in advance for any insight to my stupidity.