declare const isIOS: boolean;
declare const viewportWidth: number, viewportHeight: number;
declare const isSmallDevice: (minWidth?: number) => boolean;
declare const horizontalScale: (size: number) => number;
declare const verticalScale: (size: number) => number;
declare const moderateScale: (size: number, factor?: number) => number;
declare const scaledForDevice: (size: number, scaleCallback: (size: number) => number) => number;
export { isIOS, viewportWidth, viewportHeight, isSmallDevice, horizontalScale, verticalScale, moderateScale, scaledForDevice, };