I just launched a goofy little app called Privy that allows you to send a message to another Android user that is only viewable once. It's free (ad supported) and there is no signup required.<p>https://play.google.com/store/apps/details?id=com.appidio.privy<p>Basically, you compose a message and/or take a picture. When you send it the message is uploaded to Amazon S3 and a link is texted to the recipient. When the recipient follows that link it downloads the message (never saves it) and then deletes the image from S3.<p>I would love to hear your feedback and questions. Thanks!