WAarogya Setu is an Indian COVID–19 "contact tracing, syndromic mapping and self-assessment" digital service, primarily a mobile app, developed by the National Informatics Centre under the Ministry of Electronics and Information Technology (MeitY). The app reached more than 100 million installs in 40 days. On 26 May, amid growing privacy and security concerns, the source code of the app was made public.
WCorona-Warn-App is the official and open-source COVID-19 contact tracing app used for digital contact tracing in Germany made by SAP and Deutsche Telekom subsidiary T-Systems.
WMySejahtera is a mobile app developed by the Government of Malaysia to facilitate contact tracing efforts in response to the COVID-19 pandemic in Malaysia. The main goal is quick identification of persons who may have come into close contact with anyone who has tested positive for COVID-19.
WNHS COVID-19 is a contact tracing app for monitoring the spread of the COVID-19 pandemic in England and Wales. It has been available since 24 September 2020 for Android and iOS smartphones, and can be used by anyone aged 16 or over.
WNZ COVID Tracer is a mobile software application that enables a person to record places they have visited, in order to facilitate tracing who may have been in contact with a person infected with the COVID-19 virus. The app allows users to scan official QR codes at the premises of businesses and other organisations they visit, to create a digital diary. It was launched by New Zealand's Ministry of Health on 20 May 2020, during the ongoing COVID-19 pandemic. It can be downloaded from the App Store and Google Play.
WTraceTogether is a digital system the Government of Singapore implemented to facilitate contact tracing efforts in response to the COVID-19 pandemic in Singapore. The main goal is quick identification of persons who may have come into close contact with anyone who has tested positive for COVID-19. The system initially consisted of an app, by the same name, and was later supplemented by a physical token mainly intended for elderly and children who may not own a smartphone, or those who prefer not to use the app. The system helps in identifying contacts such as strangers encountered in public one would not otherwise be able to identify or remember. Together with SafeEntry, it allows the identification of specific locations where a spread between close contacts may occur.
WValtrace is a contact tracing platform used in Valenzuela, Metro Manila. Its current role is to replace paper forms that increases possible contact with the virus. Valtrace uses QR code technology to provide contact-less tracing within the city. People who are going into the city's establishments should register to the program in order to enter the establishment.