I started using Authy to manage my 2FA tokens well over a half decade ago; I used Google Authenticator previously, but as I was starting to switch devices regularly, I needed a solution that works across several devices, iOS, and Windows. To its credit, Authy offered everything I needed of a 2FA client, so I moved all of my tokens to the service, and it has been hassle-free — until now.
Authy stores 2FA tokens associated with your account on its servers, and you'll need to set up a backup password to decrypt accounts when moving to a new device. The backup password isn't stored anywhere, and while there have been a few glitches in the past when the password wasn't recognized on a new device, resetting it on the older device and keying in the new one always did the trick.
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