Apps to Use iOS Devices In Place of Notetakers?

Hello all, I'm sorry if a post similar to this one exists but I searched and could not find anything.
I use an iPhone six and a BrailleNote Apex.
Soon the BrailleNote will be taken away for fixing. That is the only device I use for school, and I will not get a temporary replacement. I will get a computer but that will not happen until next year if all goes according to plan.
So I figured I have to work with whatever is available to me at the moment. In this case it's the iPhone.
Is there a way, or are there apps that would allow me to use the iPhone in place of a notetaker? I am mainly concerned with word-processing, saving attachments from email, and transferring files to and from Dropbox for example. Also anything that you think of that might be useful I did not mention is also appreciated.
Thanks for the help in advance