Aarogya Setu is a contact tracing mobile application developed by the Indian government to help fight the COVID-19 pandemic. The Android version, like its iOS counterpart, uses Bluetooth and location data (with user permission) to identify individuals who may have come into contact with someone who has tested positive for COVID-19.

Key features included (though some may have been phased out or altered over time) :

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Contact Tracing:

The app uses Bluetooth to log proximity to other Aarogya Setu users. If a user tests positive, the app can anonymously alert those who were in close contact with them.
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Self-assessment:

Users could complete a questionnaire to assess their risk of COVID-19 infection based on symptoms and travel history.
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Information Dissemination:

The app provided updates and guidelines on COVID-19 prevention and control measures from the Indian government.
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COVID-19 resource locator:

Helped users find testing centers, hospitals, and other relevant resources.

Important Note:

The effectiveness and privacy implications of Aarogya Setu have been debated. While it aimed to aid in contact tracing, concerns were raised about data security and the potential for misuse of personal information. Its use and prominence have varied over time as the COVID-19 situation evolved in India.