The free developer accounts don't get your apps into the iOS app store. That requires a paid up $99 developer account. I think (but am not sure) that you can u

The free developer accounts don't get your apps into the iOS app store. That requires a paid up $99 developer account. I think (but am not sure) that you can use them (for now) to sign a macOS app that you distribute from your own download somewhere, and Mac uses can download your apps and click through the "Yes, I trust apps signed with that Satoshi Nakamoto certificate" dialog and install them.