Table 1.
Brief comparison of contact tracing apps
| Sr# | Contact tracing app. | Objective | Architecture | Enabling technology | OS | Origin |
|---|---|---|---|---|---|---|
| 1 | COVIDSafe The contact tracing app (2021a) | Identifies Positive cases in close contacts | Centralized | Bluetooth | Android/IOS | Australia |
| 2 | TraceTogether The contact tracing app (2021) | Captures data of close contacts including duration of visit | Centralized | Bluetooth | Android/IOS | Singapore |
| 3 | Aarogya Setu The contact tracing app (2021) | Identifies Potential cases using online self-assessment and traces contacts using location data | Centralized | GPS | Android/IOS | India |
| 4 | COVIDSafe-PACT The contact tracing app (2021b) | Collects online symptoms and traces contacts including place of contact | Decentralized | Bluetooth | Android/IOS | USA |
| 5 | Hamagen The contact tracing app (2021) | Determines close contact with Positive cases using GPS technology | Decentralized | GPS | Android/IOS | Israel |
| 6 | CovidWatch The contact tracing app (2021) | Determines proximity/duration of contact and notifies others about exposures | Decentralized | Bluetooth | Android/IOS | UoA, USA |
| 7 | Epione The contact tracing app (2021) | Alerts user about exposure in the last 21 days | Hybrid | Bluetooth | Android/IOS | Africa |
| 8 | D2D Jameel et al. (2018)Roy et al. (2020) | Stores data of close contacts on the basis of proximity and contact duration | Centralized/Decentralized | Bluetooth/GPS/UWB | Android/IOS | Worldwide |