Singapore’s TraceTogether app is a clear example of a track-and-trace app used during the COVID-19 pandemic. Launched by the Singapore government in March 2020, it supported contact tracing by recording close-range encounters between participating devices.
System: TraceTogether used Bluetooth signals to exchange temporary identifiers with nearby smartphones running the app. Encounter records were stored on the user’s device for a limited period and could be uploaded to the Ministry of Health when needed for contact tracing.
Example specifics: If a person tested positive for COVID-19, health authorities could use the uploaded proximity records to identify participating users who might have been exposed. Singapore later introduced TraceTogether tokens for people who did not use compatible smartphones and required TraceTogether check-ins at many venues. This connected the digital system to the wider public-health response.
A common misconception is that TraceTogether continuously tracked users’ geographical locations through GPS. Its main proximity-detection function used Bluetooth, which recorded encounters between devices rather than a continuous location history. However, the system still created privacy concerns because identifiable contact data could be accessed by authorities, including for certain criminal investigations.
| Analytical focus | TraceTogether example |
|---|---|
| Impacts | Contact tracers could identify possible exposures faster, while users experienced new data-collection and access requirements. |
| Implications | Digital contact tracing offered opportunities for faster outbreak control, but created risks involving surveillance, data access and unequal participation. |
| People and communities | Public-health authorities prioritized disease control, while users and privacy advocates questioned consent, transparency and state power. |
Concepts: The example demonstrates systems because the app depended on users, devices, health authorities and public-health procedures working together. It also raises power and values and ethics questions about who controls personal data and whether public-health benefits justify reduced privacy.
For HL exams, connect TraceTogether to 5.1 Global well-being and identify it as an intervention that attempted to mitigate a public-health challenge. In an evaluation, weigh effectiveness against equity, acceptability, feasibility and ethics rather than merely describing how the app worked.
