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The Electronic Frontier Foundation found the Ring app was “packed” with third-party tracking, sending out customers’ personally identifiable information.

Five companies were receiving a range of information, including names, IP addresses and mobile networks, it said.

Ring said it limited the amount of data it shared.

The company told Gizmodo: “Like many companies, Ring uses third-party service providers to evaluate the use of our mobile app, which helps us improve features, optimise the customer experience and evaluate the effectiveness of our marketing.”

But the EFF said Ring was failing to protect users’ privacy, noting only one of the trackers it had found was mentioned in the company’s privacy policy.