What is Supplemental Security Income? Should I apply for that too?

Unlike SSDI, Supplemental Security Income (SSI) is a welfare program. SSI is a Federal income supplement program that is funded not by Social Security taxes but by general tax revenues. The program is designed to help aged, blind, and disabled individuals who have little or no income and provides cash benefits to meet basic needs for food, clothing, and shelter. If you have limited income and resources, you should also consider applying for SSI.