To simplify, this is a robo-investment company.
You provide them some details like your risk profile. Robot ('their computer system' for a simpler word) will decide what is best for you. You transfer them some S$ every month.
The robot will buy selected USA ETFs in US$ for you every month. Everyone investing with them owns the same ETFs. The difference is only in the ratio based on the risk profile.
You keep accumulating and dollar averaging and hope you come out ahead in the LONG-RUN. Of course, they make based on an annual fee.
Caution. This service is NOT suitable if you are short term and expect quick profits.
There are other companies doing the same thing like Stashaway.