Interesting idea and very well done. Just one question; why does it require all these permissions to get started:

    1 - Know who you are on Google
    2 - View your email address
    3 - View and manage your spreadsheets in Google Drive
    4 - View and manage data associated with the application
    5 - Allow this application to run when you are not present
    6 - Connect to an external service

I am specifically concerned about the first and third items.