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How many in the state of California will have opted in to the most highly-subscribed privacy-preserving contact tracing app, as of mid-August?

On 10 April 2020, Google and Apple, the companies that control the Android and iOS mobile platforms, announced an initiative for privacy-preserving contact tracing based on a combination of Bluetooth Low Energy technology and privacy-preserving cryptography (W).

Google and Apple are both headquartered in the State of California.

How many in the state of California will have opted in to the most highly-subscribed privacy-preserving contact tracing app, as of mid-August, 2020?

This question resolves as the highest total number of Californians reported to have opted in using the most highly-subscribed privacy-preserving contact tracing app from August 10th and August 25th (inclusive).

For the app to constitute a contact tracing app, it must be a Mobile app, and at least three credible U.S. news reports must report must refer to the application as a "contact-tracing app", "contact-tracing project", "contact-tracing system," or similar. It must also be opt-in, as judged by Metaculus.

The question resolves as 0 if no reports indicate that any app is operating as of mid-august, 2020.

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