Disclaimer: Do not even try this game unless you're up for a lot of learning and fiddling around. It takes some work to play. Some knowledge of Japanese helps as well.
This is a JRPG with some decent mechanics, collectable characters and weapons. I have yet to find any content that is unplayable on iOS with Safari.
The biggest draw of the game is probably the massive amount of playable story, all of which VO can read. If you double tap while a character is speaking, it stops scrolling the text and brings it up in full so we can read it.
Account setup takes a bit of work. You have to sign up with a Mobage account, which only works in Japanese as far as I know. I got through it because I know a little Japanese and I used iTranslate for what I didn't know.
I've used Seeing AI to learn how some screens are layed out. A lot of things read with VO, including enemy HP in battle and the gauges for your charged attacks. Some things do not read at all though, like the pop-up menu and some of the quest icons.
Battle can be a little confusing. The wiki helps here though in learning what skills and summons do. Some battles let you view a pop-up of the skill and some just use the skill when you double tap on it.
I haven't figured out how to manually assemble a party yet, but there is an auto select. When the game asks you to pick a focus and element, you can just hit select for the defaults for now. I'll play with party management later when I have more time.
I hope someone gets some enjoyment out of this. I don't really like the story so far. Not sure how long I'll stick with this since generally FFRK is my game of choice. Just thought I'd announce this is surprisingly playable for those that want a new JRPG and don't mind a a little work to play. You can find the game at:
granbluefantasy.jp
And the wiki is at:
gbf.wiki