This is unnecessary because it's a problem that's already solved. - BitWarden - for personal use, stores 2FAs and acts as an iOS password source. (The claimed

This is unnecessary because it's a problem that's already solved. - BitWarden - for personal use, stores 2FAs and acts as an iOS password source. (The claimed attacks were mitigated) - Keeper - for enterprise use, stores 2FAs and acts as an iOS password source - Duo - for 2FA for enterprise use with backup text mechanisms. Edit: Duo's primary app mechanism is similar to Google Gmail app's mechanism of a yes/no popup to approve a 2FA request ^ The above are cross-platform and extend beyond Apple.