Check out VerifyGate, an open-source, online two-factor authentication app that lets you generate time-based one-time passwords (TOTPs) without storing any sensitive information and also shows you the 2 next upcoming passwords for convenience. Simply enter your secret key, click "Generate," and get the current and next TOTPs instantly. It's a lightweight solution designed for maximum security and privacy, especially useful for those who don’t want to store their secret keys in a traditional 2FA app. Would love feedback from the HN community!