How to Minimize App Size in Flutter for Faster Downloads and Updates

In today’s fast-paced digital world, mobile app size plays a crucial role in user experience. Large app sizes not only increase download times but also consume valuable storage space on users’ devices. Then How to Minimize App Size? As a Flutter developer, it’s important to optimize your app’s size to ensure faster downloads and updates. In this blog post, we will explore effective strategies and techniques to minimize app size in Flutter and enhance the overall user experience.

Use Code Shrinkers: 

One of the most effective ways to reduce app size in Flutter is by utilizing code shrinkers. Code shrinkers remove unused code and optimize the remaining code to reduce the size of the compiled app. Two popular code shrinkers used in Flutter are ProGuard (for Android) and R8 (for Android and iOS). These tools analyze your app’s code and automatically eliminate any unused resources, resulting in a smaller app size.

Compress and Optimize Assets: 

Another significant contributor to app size is the presence of large media assets such as images, videos, and audio files. To minimize the impact of these assets on app size, consider compressing and optimizing them. Tools like ImageOptim or TinyPNG can help reduce the size of images without compromising their quality. Additionally, use modern image formats like WebP, which provide better compression compared to traditional formats like JPEG or PNG.

Use Dynamic Linking: 

Flutter allows you to split your app into multiple dynamic libraries, which can be loaded only when required. By utilizing dynamic linking, you can reduce the initial app size and improve download times. Flutter’s native dynamic linking support helps ensure that only the necessary libraries are downloaded, resulting in a smaller overall app size.

Remove Unused Packages and Dependencies: 

As your app evolves, it’s common for unused packages and dependencies to accumulate over time. Regularly review your project’s dependencies and remove any that are no longer necessary. This practice not only reduces the app size but also improves the maintenance and stability of your codebase.

Utilize Code Splitting and Lazy Loading: 

Flutter provides features like code splitting and lazy loading, which allow you to load specific parts of your app on demand. By splitting your app’s code into smaller, more manageable chunks, you can reduce the initial download size and improve the overall performance. This approach is particularly useful for large applications with complex feature sets.

Optimize Fonts and Internationalization: 

Fonts can significantly contribute to the app size, especially when multiple languages are supported. To minimize the impact of fonts, consider using system fonts whenever possible. System fonts are already available on the user’s device, eliminating the need to bundle them with your app. Additionally, optimize your app’s internationalization by providing language-specific assets and resources only for the supported locales.


In the competitive world of mobile applications, optimizing app size is crucial for delivering a seamless user experience. By implementing the strategies mentioned above, you can significantly reduce the app size in Flutter, leading to faster downloads and updates. Remember to use code shrinkers, compress assets, leverage dynamic linking, remove unused dependencies, utilize code splitting and lazy loading, and optimize fonts and internationalization. By following these best practices, you’ll not only enhance user satisfaction but also make your app more efficient and accessible to a wider audience.