Does Flutter use my system’s OEM widgets?

 In

No. Instead, Flutter provides a set of widgets (including Material Design and Cupertino (iOS-styled) widgets), managed and rendered by Flutter’s framework and engine. You can browse a catalog of Flutter’s widgets.

We are hoping the end-result will be higher quality apps. If we reused the OEM widgets, the quality and performance of Flutter apps would be limited by the quality of those widgets.

In Android, for example, there’s a hard-coded set of gestures and fixed rules for disambiguating them. In Flutter, you can write your own gesture recognizer that is a first-class participant in the gesture system. Moreover, two widgets authored by different people can coordinate to disambiguate gestures.

Modern app design trends point towards designers and users wanting more motion-rich UIs and brand-first designs. In order to achieve that level of customized, beautiful design, Flutter is architectured to drive pixels instead of the OEM widgets.

By using the same renderer, framework, and set of widgets, it’s easier to publish for both iOS and Android concurrently, without having to do careful and costly planning to align two separate codebases and feature sets.

By using a single language, a single framework, and a single set of libraries for all of your UI (regardless if your UI is different for each mobile platform or largely consistent), we also aim to help lower app development and maintenance costs.

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