Currently, Maybank SaveUp Account offers the highest bonus interest rate at approximately 3% for an average person who fulfils the tasks of credit card spend, salary crediting and bill payment. However, i personally find that the requirement of at least $300 GIRO payment can be a little taxing.
The savings account that offers the second highest bonus interest rate would be UOB One Account at 2.44%. Its requirement is relatively easier to complete. If you prefer to have flexibility over the amount that you spend monthly like me, can also consider DBS Multiplier.
Source on best active savings account:
https://theboywhoprocrastinates.blogspot.com/2018/05/best-active-savings-accounts-for-2018.html
Dun see how $300 giro is taxing