[bgruber]

redhat also makes a prettier version (https://play.google.com/store/apps/details?id=org.fedorahost...). not as pretty as authy, but less sketchy w/ the pointless permissions. Also, authy cloud syncs your accounts which seems like a bad idea.

[sciurus]

It enables http://blog.authy.com/multi-device , which is either very handy or stupid depending on how paranoid you are.