Flet
Build modern cross-platform apps in pure Python.
Pricing
Free tier
Flat rate
Adoption
↗RisingLicense
Open Source
Data freshness
Verified · Jul 16, 2026Overview
What is Flet?
Flet is a cross-platform GUI framework that allows developers to create modern applications using only Python. It simplifies the process of building desktop, web, and mobile apps with a single codebase.
Key differentiator
“Flet stands out as a Python-centric solution that simplifies cross-platform app development, offering a single codebase approach with modern UI components.”
Capability profile
Capability Radar
Honest assessment
Strengths & Weaknesses
↑ Strengths
↓ Weaknesses
API requires Python-specific patterns, TypeScript SDK is community-maintained
v0.1 to v0.2 migration required rewriting chain definitions
Small ecosystem compared to more established frameworks like Flutter or React Native
Real-time updates using WebSockets can lead to lag in applications with a large number of components
Fit analysis
Who is it for?
✓ Best for
Python developers looking to build cross-platform apps with minimal effort
Teams that want a unified codebase across desktop, web, and mobile platforms
✕ Not a fit for
Projects requiring deep customization of native UI elements on each platform
Developers who prefer using multiple languages or frameworks for different platforms
Cost structure
Pricing
Free Tier
Available
Open source — free to use
Starts at
$0
Model
Flat rate
Enterprise
None
Performance benchmarks
How Fast Is It?
Ecosystem
Relationships
Works well with
Next step
Get Started with Flet
Step-by-step setup guide with code examples and common gotchas.