Singapore's Land Transport Authority said the apps will have to apply for a three-yearly "certificate of registration" starting from the second quarter of next year.
"Third-party taxi booking services facilitate more efficient matching of taxis with commuters and have become increasingly popular," the LTA said, adding the new rules are designed to "safeguard commuter safety and interests".
Apps operating in Singapore will need to agree to dispatch only licensed taxis and drivers, while information on fare rates and other fees payable for a ride must be disclosed to passengers.