I just did a similar thing over the weekend. I transferred stuff from my iPhone5 to my note 3. i.e. Messages, contacts, videos, photos
Just PM me and when I get home I will give you the name of the app i used. Cant remember the name right now. It allows transfer accorss different devices. ios>android or android>ios
I am also in the process of transferring my whatsapp messages as well. I downloaded an app which does this but havent tested it as yet. Users claim that it works.
I can only confirm if it works once I get a chance to test it out myself.
Thanks that would be great.
With regards to Whatsapp, I used a piece of software called Whatsapp Migrator which involves quite a bit of tinkering different files but worked perfectly when I moved from iPhone to Note 3 but not sure it is possible vica-versa as Apple won't allow you access to the files you need - unless I jailbreak and can access the file, hmmm need to look into that.
it be great if there was a way to get my contacts and SMS from android to iPhone. All pics are saved to memory card so can transfer what I need.