Update: Starting on 26 April 2022, most venues no longer require check-ins. Only larger events with more than 500 participants at any one time, and certain nightlife establishments, require the public to check in with their TraceTogether App or Token for VDS checks. Venues that want to use the SafeEntry Gateway feature for VDS checks should set up the SafeEntry (Business) App. For more details, see this press release.
All public-facing venues that are mandated to implement SafeEntry (as reflected on SafeEntry.gov.sg/deployment) have to implement Token check-in modes to allow their visitors to use their TT Tokens to check in SafeEntry. Non-public-facing venues, such as workplaces, do not need to implement Token check-in mode if their employees use TT App for check in.