According to this article, for the year 2016, the bank with the best interest rates for savings is the DBS Multiplier Programme.
(http://www.moneydigest.sg/2016s-profitable-savings-accounts-singapore/)
The more you use your account for transactions, the higher interest you shall receive. If your banking transactions adds up to more than S$7,500 a month then, you are eligible for an interest of up to 2.08%. But if your monthly transaction is less than S$7,500 monthly, they will still reward you with 0.05% interest.
https://www.dbs.com.sg/personal/rates-online/multiplier-account.page