Described as a 'pick-up-and-go RPG', the original adventure sees a huge party of characters battling through a series of enemy encounters.
Each character can attack once their Active Time Battle (ATB) gauge has filled, by tapping or swiping it.
Experience earned from battle unlocks new party member slots so more characters can be used in battle.
Every three hours, a special timed Fever option allows players to attack without waiting for the gauges to fill, complete with special effects and the series's trademark Chocobo music.
Battles will feature cameos from throughout the series, such as music, character jobs and encounters with familiar bosses and classic enemies like Behemoths, Bombs and Cactuars.
Meanwhile, the in-game shop also features 35 premium characters, where each purchase gives a new, random character from throughout the Final Fantasy series.
Also available for purchase are original stages from Final Fantasy VII, X and XIII.
Finally, there are also extensive catalogues for characters, enemies and items, as well as leaderboards and social networking features that reward extra party slots for Facebook or Twitter sharing.
The title was teased earlier this week by Square Enix, and was speculated to be iOS ports of SNES entries Final Fantasy V and Final Fantasy VI.
Final Fantasy: All the Bravest will be priced at £1.99/$2.99.
Square Enix recently said that high-end iOS pricing is more profitable than free-to-play on the service.
Other recent iOS releases include Final Fantasy Dimensions for £19.99/$28.99, while a port of DS title The World Ends with You retailed for £12.99/$17.99.
> Final Fantasy retrospective: A look back at 25 years of the RPG series
Gallery - View screenshots of recent iOS release Final Fantasy Dimensions below: