Flet 1.0 allows developers to create web, desktop, and mobile applications using only Python, eliminating the need for separate frontend code.

The framework provides over 150 controls and services for building user interfaces, including layouts, navigation components, forms, and dialogs with customizable colors and typography.

Developers can integrate existing Python libraries such as NumPy, pandas, Pillow, and cryptography into their apps, with prebuilt packages available for iOS and Android platforms.

Flet supports deployment across multiple environments: desktop operating systems, mobile platforms, web browsers via WebAssembly and Pyodide, and server-based architectures that deliver real-time UI updates.

A simple counter application demonstrates the workflow. The example uses a Text widget to display a number and a FloatingActionButton that increments the value when tapped, updating the display through a Python function.

Developers can test applications using pytest frameworks that simulate user interactions like button presses and text input, with screenshot capabilities for mobile platforms.

The Flet Studio browser-based environment lets users start building without local installation, offering access to example projects and AI-assisted code editing.

Accessibility features include screen reader support through labeled interfaces and custom semantics, as well as tools for implementing keyboard shortcuts.

The Flet MCP extension provides coding assistants with context-specific API guidance, helping developers locate examples, icons, and command-line tools.

Custom UI components can be created by composing Python-based controls or wrapping Flutter packages as extensions.

Distribution tools allow packaging applications for App Store and Google Play submission, as well as web deployment options.

Flet 1.0 aims to streamline the development process for teams seeking to maintain a single codebase while targeting multiple platforms.