Yes it does.
Never
Impossible. If you are in Creative Mode, you can not craft!!
You would have to make a Creative Mode world...
There really is no need to craft in Minecraft PE Creative Mode. You have an infinite amount of every single item and block in the game in your inventory already exept 4 command blocks
You can't currently get flint in Minecraft PE.
Currently, you cannot change day to night but it is thought to come in a few updates.
There is no app you download to change your current gamemode in a world in Minecraft: Pocket Edition. Once you select a gamemode for a world, that is your permanent mode, you can't change it around.
No, nor can you in survival. The Nether Reactor of Minecraft PE is not the same as the Nether in the PC or Xbox versions. Nether reactors only work in survival (intentional)
Survival and creative single and multiplayer
Currently, there is no way to change your game mode in a game (In the Pocket Edition). The default world will put you in survival, but you can make it a creative world by taping the Gamemode button.
Since you can't mod Minecraft PE, there's no way to add Herobrine in.
Unfortunately you cant because there is no way to get flint and steel. :(
as of 0.6.0, it is currently impossible to acquire a "flint and steel" in creative mode. this is most likely due to the low processing power ram capacity of today's mobile phones. however, there are some mobile mods that somehow bypass mojang's efforts and allow the use of flint and steel in creative. did i sound smart? keep in mind that i am not smart and that this is just practice for my report next month.