Flutter has support for native UI elements for both android and iOS . 5. Kivy uses some bridge scheme for compiling the code, so it is comparatively slower to develop applications in it. Flutter compiles to native code that runs on Dart VM, which makes it faster to create applications and easier for testing.
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The BeeWare Project – Native Python Mobile Apps The key difference between Kivy and BeeWare is that BeeWare programs use the native UI toolkit of the platform they run on, whereas Kivy apps use a custom UI toolkit that uses the same controls across all platforms .
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