Better Icons (top right menu)
I think the icons at the top left could be much clearer in function, especially because the icons used are very similar to other icons in the real world which often have very different functions.
For example, the 'Inbox' icon is very similar to the 'Share' button on Android systems, resulting in a non-intuitive icon which doesn't match with commonly accepted standards.
Furthermore, the 'Organise' icon is the same as the 'Shuffle' icon in many popular music players, which implies the opposite of organisation. I would recommend a folder icon, or something which implies organisation.
The dropbox icon is good as it is quite similar to common icons in use, and represents it's function clearly.
The 'Notifications' icon is very similar to 'Feedback' or 'Support' icons on many websites/applications, which is somewhat confusing. I would recommend possibly a bell icon instead.