https://www.tracetogether.gov.sg/common/privacystatement

What data is collected? Are you able to see my personal data?

The only data that we collect is your mobile number, so that MOH can contact you more quickly if you were in close proximity to a COVID-19 case.

With your consent, TraceTogether exchanges Bluetooth proximity data with nearby phones running the same app. However, this data is anonymised and encrypted, and does not reveal your identity or the other person's identity. Also, this data is stored only on the user’s phone. Should MOH need the data for contact tracing, they will seek your consent to share it with them.