I didn't see any updates on the blog to answer this question, but you CAN get personal documents on your kindle device or app for iOS or android.
On your Amazon account, browse to Personal Documents under your Kindle Library, and you will see information for your Personal Document settings. There is an email address (usually
amazon_username@kindle.com) to which you can send your personal documents and have them loaded on your app.
You probably already know this by now.
More details:
https://wiki.mobileread.com/wiki/Kind...Partial_Truths