As far as I know, there is only one way to build your credit score without paying interest or fees. (thecollegeinvestor.com)
You will not get charged interest or fees in addition to the fixed monthly charge of the tier you selected. (support.robinhood.com)
This type of trading account is mainly popular in Islamic countries where the religion laws forbid the collection or payment of interest or fees for loans. (smnweekly.com)