Well i know that EcoCash Save is a paperless , safe and fast service that allows you to save, borrow through your phone which is a good facilite to have.
It also has competitive interest rates on savings,
Interest is calculated daily and paid out at the end of each calendar month.There are no ledger fees.
There are no withdrawal charges in moving money between EcoCash Save account and EcoCash which is an interesting thing to know.