Calculator App for iOS

1 Attachment

I'm working on calculator app now for one of my clients. Here you have first screen of it. The purpose is to make this calculator well designed and to keep clarity and similarity in layout to an original iOS calculator.
There'll be possibility of theme changing (paint roller icon) and some other features. Soon I'll show more.

Please check real pixels and @2x. Hope you like it - any feedback is appreciated.

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