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CustomTkinter VS Kivy

Compare CustomTkinter VS Kivy and see what are their differences

CustomTkinter logo CustomTkinter

CustomTkinter is a python desktop UI-library based on Tkinter, which provides modern looking and fully customizable widgets.

Kivy logo Kivy

Open source Python framework for rapid development of applications that make use of innovative user interfaces, such as multi-touch apps. Installation on WindowsInstallation on Windows. Installation; What are wheels .
  • CustomTkinter Landing page
    Landing page //
    2026-07-16
  • Kivy Landing page
    Landing page //
    2023-09-15

CustomTkinter features and specs

  • Modern UI Appearance
    CustomTkinter provides a modern, flat, and visually appealing look for Tkinter applications, with rounded corners, better color schemes, and improved widget styling compared to standard Tkinter.
  • Easy Transition from Tkinter
    Since it's built on top of Tkinter and uses similar syntax and widget names, developers familiar with Tkinter can easily transition to CustomTkinter without a steep learning curve.
  • Built-in Dark and Light Mode
    CustomTkinter supports automatic and manual switching between dark and light appearance modes, making it easy to create apps that adapt to system themes or user preferences.
  • Customizable Themes
    The library allows for extensive customization through theme files (JSON), enabling developers to create and apply custom color schemes and styles across their entire application.
  • Cross-Platform Compatibility
    CustomTkinter works across Windows, macOS, and Linux, providing a consistent look and feel across different operating systems, which is an improvement over native Tkinter's platform-dependent appearance.

Possible disadvantages of CustomTkinter

  • Limited Widget Set
    Compared to more mature GUI frameworks like PyQt or Kivy, CustomTkinter offers a smaller set of widgets, which may require additional custom development for complex applications.
  • Performance Overhead
    The additional styling and rendering logic on top of Tkinter can introduce slight performance overhead, especially in applications with many widgets or frequent UI updates.
  • Dependency on Tkinter Limitations
    Since it's built on Tkinter, CustomTkinter inherits some of Tkinter's inherent limitations, such as less flexible layout management and fewer built-in animations compared to modern frameworks.
  • Smaller Community and Ecosystem
    As a relatively newer library, CustomTkinter has a smaller community, fewer third-party extensions, and less extensive documentation compared to more established GUI frameworks.
  • Occasional Bugs and Inconsistencies
    Being under active development, users may encounter occasional bugs, inconsistent behavior across platforms, or breaking changes between version updates that require code adjustments.

Kivy features and specs

  • Cross-Platform
    Kivy allows you to write your application code once and run it on multiple platforms, including Windows, macOS, Linux, iOS, and Android, reducing development time and effort.
  • Open Source
    Kivy is an open-source framework, which means it is free to use and has a community-driven development model. This also allows developers to contribute to its improvement.
  • Rich User Interface
    Kivy provides a wide range of widgets and controls that can be customized to create highly interactive and attractive user interfaces.
  • Touch Support
    Kivy is designed with built-in support for multitouch events, making it a good choice for applications that require touch interactions.
  • Dynamic and Fast
    Thanks to its use of Cython, Kivy applications can achieve high performance and responsiveness.
  • Consistent Look and Feel
    Kivy apps maintain a consistent look and feel across all supported platforms, which can lead to a better user experience.

Possible disadvantages of Kivy

  • Steep Learning Curve
    Kivy can be challenging for beginners due to its custom language (Kv) and lack of extensive documentation.
  • Limited Community Support
    Compared to more established frameworks, Kivy has a smaller user community, which can make finding help and resources more difficult.
  • Lagging behind in Platform Integration
    Kivy may not offer the same level of integration with native platform features (such as navigation and notifications) as other frameworks like React Native or Flutter.
  • Debugging Complexity
    Debugging Kivy applications can be complex, especially when dealing with cross-platform issues, as the error messages are not always straightforward.
  • Performance Issues on Some Platforms
    Performance may not be consistent across all platforms, particularly on iOS devices where Kivy apps might suffer from performance degradation.
  • Limited Third-Party Libraries
    The ecosystem of third-party libraries and plugins is not as extensive as those available for other popular frameworks, which might limit functionality.

Analysis of CustomTkinter

Overall verdict

  • CustomTkinter is a solid choice for Python developers who want to build modern-looking desktop GUIs without leaving the familiar Tkinter ecosystem. It provides a good balance between ease of use and visual polish, making it especially attractive for smaller to medium-sized projects.

Why this product is good

  • Built on top of standard Tkinter, so it's easy to learn if you already know Tkinter
  • Provides modern, flat-styled widgets with rounded corners and better default aesthetics than vanilla Tkinter
  • Supports light and dark mode theming out of the box, including system theme detection
  • Cross-platform support for Windows, macOS, and Linux
  • Actively maintained with regular updates and a growing community
  • Free and open-source with a permissive license
  • Good documentation and examples to help beginners get started quickly
  • Customizable color themes and widget appearance without needing CSS-like styling

Recommended for

  • Python developers who want a quick way to modernize Tkinter-based UIs
  • Hobbyists and students building desktop apps for personal or academic projects
  • Small business or indie developers creating internal tools or utilities
  • Developers who prefer lightweight GUI frameworks over heavier alternatives like PyQt or Kivy
  • Projects that need dark mode support without complex theming systems
  • Anyone already familiar with Tkinter looking for an easy upgrade path

CustomTkinter videos

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Kivy videos

Kivy Intro - Mobile and Desktop App Dev w/ Python

More videos:

  • Review - Starting on a GUI: WXpython vs Kivy #MP55

Category Popularity

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Rapid Application Development
Game Development
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IDE
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Developer Tools
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User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare CustomTkinter and Kivy

CustomTkinter Reviews

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Kivy Reviews

25 Python Frameworks to Master
Unlike PyQt, Kivy is free and open-source, isnโ€™t a wrapper around an external UI library, and is licensed under the MIT license, which means you can ship and monetize your Kivy apps.
Source: kinsta.com
Which Python GUI library should you use? Comparing the Python GUI libraries available in 2023
The look and feel of Kivy is extremely customizable, allowing it to be used as an alternative to libraries like Pygame (for making games with Python). The developers have also released a number of separate libraries for Kivy. Some provide Kivy with better integration and access to certain platform-specific features, or help package your application for distribution on...
10 Best Python Libraries for GUI
Kivy was written with a mix of Python and Cython, and it helps build some of the most intuitive user interfaces with multi-touch applications. These multi-touch applications help implement Natural User Interface (NUI), which is a type of interface where the user naturally learns about the various interactions while theyโ€™re usually invisible.
Source: www.unite.ai
Top 6 Python Framework for Game Development | by Ankur Kumar | unikaksha | Medium
Kivy is a Python game development framework for businesses. Itโ€™s an open-source Python library that lets programmers easily construct apps with unique user interfaces, such as multi-touch apps. Kivy assists in developing apps for Windows, Linux, and iOS devices such as iPhones, iPads, and Android devices such as phones and tablets.
Source: medium.com
Top 10 Python GUI Frameworks for Developers
With Kivy, interface designers can code once and deploy to multiple platforms, while the built-in support for OpenGL ES 2 allows them to use modern and powerful graphics and design techniques. The most common use of the Kivy GUI framework in the real-world can be seen in our Android and iOS applications. Other widespread implementations of the framework can be seen in the...

Social recommendations and mentions

Based on our record, Kivy seems to be more popular. It has been mentiond 48 times since March 2021. 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.

CustomTkinter mentions (0)

We have not tracked any mentions of CustomTkinter yet. Tracking of CustomTkinter recommendations started around Jul 2026.

Kivy mentions (48)

  • Ask HN: What Toolchains Are People Using for Desktop App Development in 2025?
    Because I mainly work with python, I am using Kivy (https://kivy.org/). Earlier I was HTMX, Jinja templates, Flask, Tailwind and little vanilla JS. It was too inelegant for my taste. I am considering moving to either Swift, or JS/Svelete. - Source: Hacker News / 11 months ago
  • Plain โ€“ a web framework for building products with Python
    There are some things available, and people are working on it. Coincidentally, one of those people is Russell Keith-Magee of Django fame, who founded the BeeWare project. https://beeware.org/ https://beeware.org/about/team/freakboy3742/ https://kivy.org/. - Source: Hacker News / over 1 year ago
  • How to Develop a User Data Storage Registration Form Using Python.
    We will create this complete Python registration form using Kivy. We get started by installing Kivy, a powerful Python framework for building interactive applications. - Source: dev.to / over 2 years ago
  • Ask HN: Can I create a mobile and Web App using Python/Python Framework?
    For reference, YouTube runs on Python[1,2,3]: > 1. Python and Django: YouTubeโ€™s backend is predominantly written in Python, offering a balance of performance and readability. > 2. Google Cloud Platform... > 3. Java and C++: YouTube also utilizes Java and C++ for specific backend services, as they provide better performance for certain tasks. --- A long time ago, I looked into these Python frameworks: -... - Source: Hacker News / over 2 years ago
  • Python GUI libraries? <3
    I suggest you use kivy which is suitable for the desktop but also has the advantage of being one of few options for creating Python based native(ish) mobile apps (for IoS and Android app stores). Source: over 2 years ago
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What are some alternatives?

When comparing CustomTkinter and Kivy, you can also consider the following products

PyQt - Riverbank | Software | PyQt | What is PyQt?

Blender - Blender is the open source, cross platform suite of tools for 3D creation.

Qt - Powerful, flexible and easy to use, Qt will help you not only meet your tight deadline, but also reduce the maintainable code by an astonishing percentage.

Unreal Engine - Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.

GTK - GTK+ is a multi-platform toolkit for creating graphical user interfaces.

Unity - The multiplatform game creation tools for everyone.