Are the class requirements different in Final Fantasy Tactics for the iPhone

From a bit of looking around, it appears that the iOS version of FF2 is a pretty much direct port of the PSP version with added touch controls, so if you can find any information related to the PSP version, that should apply here as well.

That being said, I looked at multiple walkthroughs and reviews for the PSP version, and many of them mentioned hitting yourself to increase HP, as well as spending lots of MP to increase your maximum. So both of those tricks should work.

However, the cancelling trick was removed from the GBA version of the game, and has not been present in any of the ports/remakes from that point onwards.

The permanent boost from effects like Ramza's skills and the lectures of a Orator is only a fraction of the change you see during battle. Ramza may be able to raise a unit's Bravery by 5, but the permanent boost is only going to be 1. The same goes for the Orator's skills that raise or lower Bravery and Faith (and, to point, the Orator is the only way to boost Faith in this fashion).

As such, if you want significant boosts to your Bravery or Faith stats in either direction, you need to be using the abilities to alter your Bravery and Faith stats repeatedly during battle. In due time, you'll see the impact. Keep in mind, however, that with the permanent stats: a unit who hits 5 Bravery or lower will leave your army out of fright, while a unit who hits 98 Faith or higher will leave your army out of religious enlightenment (this latter one means the actual Faith stat, so being under the "Faith" status effect doesn't cause this). So be wary while you play around with these and make sure not to go so far as to lose your units!