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An app that would turn an Apple Watch into a U2F 2FA device would be great. It would also need to work as such a device for logins to Google and AWS.

• laken 8y ago
  https://krypt.co/ https://krypt.co/ kinda does this (not affiliated)
• satysin 8y ago
  Well you can use the Authy Apple Watch app for TOTP but I am not aware of anything that works like Microsoft or Google's prompt system.