Low statutory complexity, English-speaking, multi-currency by default.
Singapore trading is largely a multi-currency problem: goods bought in one currency, held, and sold in another, often without ever entering the country. That makes per-document exchange rates and clean three-way matching the whole game, and both are built. Statutory complexity is low by regional standards and there is no e-invoicing mandate, so nothing blocks day-to-day use. GST returns themselves are not prepared by Rebota.
This page is the intersection. The country page covers currency, financial year and statutory position in detail; the sector page covers what is built, the turnover bands it suits, and what is missing regardless of country.