This app is hosted on the iOS App Store as Yubico Authenticator.
See the file LICENSE for copyright and license information.
This is an authenticator app compatible with the OATH standard for time and counter based numeric OTPs, as used by many online services. To store these credentials and generate the codes, it uses a compatible YubiKey, connected either via NFC or the Lightning port.
Add credentials by tapping the menu icon, selecting Add account and then
either add a credential by scanning a QR code, or by tapping the Enter manually
button.
Once credentials have been added, simply tap or connect your YubiKey to display codes.
Besides the OATH functionality this app also support authetication using the CTK extension functionality provided by Apple. The authentication is handled using certificates stored in the Smart card application on the YubiKey.
This app is developed in Xcode and the only external dependency is the YubiKit iOS SDK which is added using the Swift Package Manager. To build the app simply open the project file and hit the build button.
Please report app issues in the issue tracker on GitHub.