Table 2.
Detection rate of countries that launched contact-tracing apps (CTAs).
| Country | App names | Detection rate (%) | Date of detection rate data |
| China | WeChat and Alipay | 42 | March 14, 2022 |
| Japan | COCOA | 17 | May 2, 2022 |
| Korea | Corona 100m | 26 | March 14, 2022 |
| Mongolia | ERSDEL | 34 | August 16, 2021 |
| Vietnam | PC-Covid | 32 | May 2, 2022 |
| Thailand | Mor Chana | 6 | May 2, 2022 |
| Myanmar | SawSaw Shar | 0 | May 2, 2022 |
| Malaysia | MySejahtera | 14 | May 2, 2022 |
| Indonesia | PeduliLindungi | 1 | May 2, 2022 |
| Pakistan | COVID-19 Gov PK and CoCare | 0 | May 2, 2022 |
| India | Aarogya Setu | 1 | May 2, 2022 |
| Bangladesh | Corona Tracer BD | 0 | May 2, 2022 |
| Lebanon | Ma3an | 9 | May 2, 2022 |
| Iceland | Rakning C-19 | 52 | May 2, 2022 |
| The United Kingdom | NHS COVID-19 | 35 | April 4, 2022 |
| Belgium | Coronalert BE | 24 | May 2, 2022 |
| Switzerland | SwissCovid | 34 | May 2, 2022 |
| Hungary | VirusRadar | 7 | May 2, 2022 |
| Russia | Госуслуги.COVID трекер | 6 | May 2, 2022 |
| Portugal | StayAway Covid | 39 | May 2, 2022 |
| Spain | Radar COVID | 13 | May 2, 2022 |
| Malta | COVID Alert Malta | 33 | May 2, 2022 |
| Cyprus | CovTracer-EN | 25 | May 2, 2022 |
| Niger | Niger Contact Tracer | 0 | May 2, 2022 |
| Uganda | MoH CTC | 0 | May 2, 2022 |
| South Africa | COVID Alert SA | 3 | September 27, 2021 |
| New Zealand | NZ COVID Tracer | 29 | May 2, 2022 |
| Canada | COVID Alert | 9 | May 2, 2022 |
| The United States | NOVID | 13 | May 2, 2022 |
| Colombia | CoronApp - Colombia | 3 | May 2, 2022 |
| Peru | Perú en tus manos | 3 | May 2, 2022 |
| Brazil | Coronavírus – SUS | 5 | May 2, 2022 |
| Uruguay | Coronavirus UY | 50 | April 4, 2022 |