using System;

public class Program

{

    public static void Main()

    {

        var str = @"Microsoft Office Excel/1.25.903 (iOS/8.1.1; Phone; hu-HU; AppStore; Apple/iPhone5,2)&Excel (iPhone)/17.7.14.0";

        var strl = str.ToLower();

        Console.WriteLine(str.Contains("Apple"));

    }

}