What Are the Differences Between Series E Bonds and Eye Bonds?

The interest rate on series e bonds right now is zero point one, zero %. But they have this like little astres fine print in a seres ebon that says, regardless of what that interest rate is, it will be guaranteed to double in 20 years if you hold it. So for instance, i think ally savings, which is the one our family usess not a recommendation, just where we trow our money as zero point seven, five % for a savings account.