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Please give it a try and provide an honest feedback if you want to see more smart watches supported.
iWatch is the first one in the queue.

Generate and transfer two-factor authentication (2FA) TOTP accounts to smartwatches. Once transferred, tokens can be generated directly from your watch, eliminating the need for your iPhone. Supports various smartwatch brands and offers secure account backups.
1.2.7
June 30, 2023
1. New icons 2. Watch app was upgraded to support WatchOS 9.4
2FA Hub is a paid utility app that generates and transfers two-factor authentication (2FA) TOTP accounts to smartwatches. It allows you to generate tokens directly from your watch after the initial transfer.
2FA Hub supports all recent Fitbit, Apple, many Samsung, and WearOS smartwatches. You may need a separate free application to connect to Fitbit or Samsung devices.
Yes, 2FA Hub offers account backups to local iPhone filesystem, iCloud, or Google Drive storage. These backups utilize password-based encryption for portability.
No, 2FA Hub does not contain advertisements. It is a paid application with a one-time purchase price of $3.99.
2FA Hub uses Apple's Key Chain API and strong cryptographic algorithms for data protection on iPhone and iWatch devices. Backups are also protected with password-based encryption.
Yes, 2FA Hub can import legacy backups created by other mobile applications, allowing you to migrate existing accounts from different platforms.
2FA Hub has an age rating of 4+, making it suitable for a wide range of users. It is available on iPhone, iPad, and iPod devices.
The latest version of 2FA Hub is 1.2.7, last updated on June 30, 2023. The developer plans to support more smartwatches in the future based on user feedback.