I've been using authy for months since it handles 2-factor auth for dnsimple. Just saw the update that supports bluetooth come in on the App Store this morning. Congrats to the team on this big release!
One thing that's nice about seeing a modern two-factor auth app with a solid business model behind it, is that Google seems to have abondoned their Authenticator app - no releases since 2011, doesn't yet work properly on iOS 7.
> ... Google seems to have abondoned their Authenticator app
What exactly would you like improved in Google Authenticator? It's not like it does anything special, it just scans TOTP QR codes and generates TOTP codes, and it does both of those pretty well.
I actually like the fact that it has no additional functionality. Everything stays on the device itself and is not sent to Google or saved "to the cloud"[1]. The only thing I think that would be an improvement would be for it fit the entire iPhone 5 screen (it's letter boxed) but that doesn't really bother me that much.
[1]: I've heard it gets backed up to iCloud but I don't use that.
All this nonsense about applications not working on iOS 7 is beginning to grind my gears. Developers aren't currently allowed to submit their apps for iOS 7. The beta is still in early stages. It'll change. A lot. Chances are that if you're complaining about applications not working on iOS 7 you shouldn't have the beta build on your phone in the first place.
One thing that's nice about seeing a modern two-factor auth app with a solid business model behind it, is that Google seems to have abondoned their Authenticator app - no releases since 2011, doesn't yet work properly on iOS 7.