> For the complete documentation index, see [llms.txt](https://docs.cotter.app/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.cotter.app/quickstart-guides/all-guides-and-tutorials.md).

# All Guides & Tutorials

Quickly get started with **our 5-minutes tutorials**:

💬 **Sign in with email/phone number:** Authenticate using a Magic Link or Verification Code. [Learn More  →](/features/verify-email-phone.md)

* [HTML Quickstart](/quickstart-guides/html-magic-link-with-email-and-phone.md)
* [React Quickstart](/quickstart-guides/react-magic-link-with-email-and-phone.md)
* [Next.js Tutorial](https://blog.cotter.app/passwordless-login-with-email-and-json-web-token-jwt-authentication-with-nextjs/)
* [Angular Tutorial](https://blog.cotter.app/angular-send-email-sms-and-whatsapp-verification-code-for-new-users-worldwide/)
* [Webflow Tutorial](https://blog.cotter.app/integrate-cotter-magic-link-to-webflow-in-less-than-15-minutes/)

🔐 **Sign In with Device on Mobile Apps:** Authenticate users based on the ownership of a device. [Learn More  →](/features/passwordless-login.md)

* [React Native Quickstart](/quickstart-guides/react-native-quickstart.md)
* [Flutter Quickstart](/quickstart-guides/flutter-sign-in-with-device.md)
* [iOS Quickstart](/quickstart-guides/ios-quickstart.md)

🧬 **Sign in with WebAuthn:** Authenticate users using TouchID/Windows Hello from your website. [Learn More  →](/features/sign-in-with-webauthn.md)

* [React Quickstart](/quickstart-guides/react-webauthn.md)