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free otp
FreeOTP is a free and open-source software token that can be used for two-factor authentication. It provides implementations of HOTP and TOTP. Tokens can be added by scanning a QR code or by manually entering the token configuration. It is maintained by Red Hat under the Apache 2.0 license, and supports Android and iOS.FreeOTP Plus (aka FreeOTP+) is a fork of FreeOTP with enhancements including exporting and importing settings.