Flutter Email Login Template - Firebase, Supabase, REST API

Fast to integrate

One CLI command generates your project with the options you need

Customizable

Composable widgets that inherit your Flutter ThemeData.

Flexible

Works with any backend or Firebase and Supabase, one command configures everything.

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Flutter email login template with form validation and error handling

AUTHENTICATION

Email login that just works

Email login is the foundation of most apps. ApparenceKit provides a production-ready login screen with email and password fields, form validation, error handling, secure token storage, and automatic session management. Choose your backend — Firebase, Supabase, or your own REST API — and the CLI configures everything.

Firebase Auth

Google-backed authentication with email verification and password reset

Supabase Auth

Open-source alternative with email, magic link, and OAuth support

REST API

Use your own backend with automatic token storage and refresh

Secure storage

Tokens in Keychain (iOS) and EncryptedSharedPreferences (Android)

Flutter login template customization examples

DESIGN

Easy to customize

The kit includes multiple reusable widgets that you can easily customize. In a few minutes you can make a unique professional email login page

Reusable widgets

Made to be easily reused and customized

Theme-aware

Inherits your Flutter ThemeData — colors, typography and spacing follow your brand automatically

Dark mode ready

Light and dark themes work out of the box, including proper contrast for text fields and error states

Flutter login template email error messages

Errors

Handles all the edge cases

From invalid email format to wrong password, from network errors to token expiration, the login template handles all the edge cases so you don't have to. Your users get clear feedback for every situation.

Email validation

Checks for valid email format and provides real-time feedback

Login errors

Clear messages for wrong password, account not found, network errors

CODE

Clean architecture, fully tested

The login module follows the three-layer architecture pattern with Riverpod state management. The authentication state is reactive — your entire app responds to login/logout events automatically. Includes unit tests for the login flow so you can refactor with confidence.

Riverpod state

Reactive auth state across the entire app

Unit tested

Login flow covered with tests

Form validation

Email format and password rules with real-time feedback

Error handling

Clear messages for wrong password, account not found, network errors

Works with the full authentication flow

The email login template is part of a complete authentication system. Combine it with the signup template, forgot password, social logins (Google, Apple, Facebook), and phone authentication to build a complete auth experience.

After login, guide your users through onboarding and present your paywall — all pre-built and ready to use.