Rule of simplicity: Design for simplicity; add complexity only where you must.

简洁原则：设计尽可能简洁，复杂度能低则低。

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George Washington praised the design for its "grandeur,simplicity, and beauty."

VOA: special.2010.01.27

And a big part of the design strategy for the app is to retain that simplicity.

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It is also notable for the harmonious relationship between the open and built spaces, the simplicity of its design, and its size.

UNESCO: Culture

We know certain images can become iconic through simplicity of design, openness to interpretation and relative ease of reproduction - the Apple logo for example.

BBC: Too famous to see?