Authy wants to 'make data available to nearby bluetooth devices' and – even if you don't allow for it – asks for Bluetooth to be turned on. What's the reason for this requests?
I'd appreciate an application directly in the app. In doubt, I simply deny such requests.
Authy is first and foremost its own 2FA system based around ownership of a phone number. Where most phone based 2FA systems just send you a SMS message with a code you need to enter, Authy installs an app on the phone in question that fingerprints the phone. The fact that you can also use Authy to store other 2FA codes as well is just viewed as a bonus feature by Authy.
I'd appreciate an application directly in the app. In doubt, I simply deny such requests.
Screenshots:
http://i.imgur.com/jTC5msY.png http://i.imgur.com/seytfhy.png