Overcast
Marco Arment, in his blog post announcing Overcast version 4.2:
In Overcast 4.2, the login screen now prominently encourages anonymous accounts by default.
And:
And the first time you launch 4.2, people with email-based accounts will be encouraged to migrate them to anonymous accounts
I’ve been using Overcast pretty much since day one, and I love listening to Marco talk about his work on ATP and Under the Radar, so while not a huge surprise I was still bowled over when I read this post. In an industry which does everything it can to squeeze every little bit of data out of users, whether legal, moral, justified, or otherwise, this guy is running in exactly the opposite direction.