Microsoft Visual Studio might be a bit more popular than Duo mobile. We know about 1 link to it since March 2021 and only 1 link to Duo mobile. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Call me lazy but..for phone 2FA auth I'm using Duo in personal mode (TOTP). See guide.duo.com for a start. It's convenient and fast. My Yubikey is used for PC web 2FA and, no, I don't do any financials on mobile devices. Reason I picked Duo is Google Auth on Android had dings for not being secure (some say). BEWARE of Duo, if you try to buy they only sell in packs of 30 so that first bill could be... Source: about 3 years ago
While the editor seems to old fashioned there isn't anything particularly wrong in using it for learning. Alternatively you can propose to your teacher about https://visualstudio.microsoft.com/vs/express/ . IMO editor is not a big factor when we are talking about high school learning. Source: about 3 years ago
Aegis Authenticator - Aegis Authenticator is a free, secure and open source app to manage your 2-step verification tokens...
IntelliJ IDEA - Capable and Ergonomic IDE for JVM
andOTP - andOTP is a two-factor authentication App for Android 4.4+
Xcode - Xcode is Apple’s powerful integrated development environment for creating great apps for Mac, iPhone, and iPad. Xcode 4 includes the Xcode IDE, instruments, iOS Simulator, and the latest Mac OS X and iOS SDKs.
OTP Auth - The app for calculating one-time-passwords on iPhone and iPad.
Visual Studio Code - Build and debug modern web and cloud applications, by Microsoft