Just migrated in bulk from Authy to Aegis Authenticator (open-source with encryption and automatic backups/exports).
Instructions:
https://gist.github.com/gboudreau/94bb0c11a6209c82418d01a59d...
Aegis-specific export:
https://gist.github.com/gboudreau/94bb0c11a6209c82418d01a59d...