What is Flutter point?

In a linear system, “flutter point” is the point at which the structure is undergoing simple harmonic motion —zero net damping—and so any further decrease in net damping will result in a self-oscillation and eventual failure.

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What is Cupertino app?

An application that uses Cupertino design . A convenience widget that wraps a number of widgets that are commonly required for an iOS-design targeting application. It builds upon a WidgetsApp by iOS specific defaulting such as fonts and scrolling physics.

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