Final Fantasy producer Takashi Tokita recently claimed that Final Fantasy VII could be possible on mobile devices, should the releases of older games in the Final Fantasy Legacy prove popular enough. However, he has stepped forward again, now saying that such a release is "years away."
What is the problem with Final Fantasy VII on mobile devices? Try file size, as Tokita recently explained to Shacknews in an interview.
"Unfortunately, it's not that it's not impossible for us to develop Final Fantasy 7 for mobile. It's that currently, space will be an issue. Phones won't be able to contain the space it takes. It's over a gigabyte. People are probably going to have to wait a few years."
Final Fantasy VII was an enormous game for its time, requiring three discs to cram the whole thing into a single package. Even on the PlayStation Store these days, it is still larger than half the library of modern day games. I'll believe Tokai in him saying that Final Fantasy VII is a beast and Square Enix's engineers might struggle with limited phone space and battery life, even.
The PC version just released on Steam weighed in at over 3GB, well beyond Apple's 2GB limit.
What leaves me a little puzzled is how Square is porting the PlayStation 2 release of Dragon Quest VIII to mobile phones, and the game's ISO clocks in at 2.6 GB. Either Square Enix is just using size as an excuse to delay Final Fantasy VII a bit longer, or Dragon Quest VIII will be a gimped port not especially loyal to the scope of that enormous game.
Or you can stop worrying and simply snag Final Fantasy VII digitally through any of the means already available, be it PlayStation Network or Steam.