Quicken Loans, Rocket Mortgage, the fill-in-the-blanks form on your bank’s online banking interface, all of these online loan approval systems are designed to benefit them, not you. They want to gather your data and determine if you are, on the surface, a profitable lead and they won’t look beyond that.
If your numbers alone are not pristine, you will not get anywhere with them. And if you do have good numbers, they are not going to shop your profile to 100 different lenders to determine for the best loan for you. That’s what I do. They will offer you whatever loan product they have. Also, none of them will generate a pre-approval letter.