As usual I am the contrarian. A secured card goes on you credit report as a credit card, but it is listed as secured. From the mouth of a mortgage underwriter, it is looked at the same as a car loan or any other secured line of credit. Either way if you use it, you must make the payments or pay in full each month. Whether it is backed by your word or your money, if you fail to make the minimum payments required it will hurt. If you make the payments required it will help, the same as any other secured loan.
You don't want to work. You want to live like a king, but the big bad world don't owe you a thing. Get over it--The Eagles