export declare const checkOs: () => {
    ipad: boolean;
    iphone: boolean;
    android: boolean;
    windowsCe: boolean;
    windowsMobile: boolean;
    win2K: boolean;
    xp: boolean;
    vista: boolean;
    win7: boolean;
    win8: boolean;
    win81: boolean;
    macOs: boolean;
};
export declare const getOs: () => string;
export declare const getAndSaveDeviceId: () => Promise<string | null>;