In August 2025, Apple initiated legal action against Chen Shi, a former architect of the Apple Watch sensor system. The lawsuit accuses Shi of downloading 63 confidential files onto a USB drive on the eve of his resignation, files that encompass sensitive health sensor technology and chip engineering data. Apple contends that Shi not only reached out to OPPO executives in an attempt to gain further insights but also sought methods to erase device data prior to his departure, using familial obligations as a pretext to mask his true motives.

Citing the Trade Secrets Protection Act and relevant confidentiality agreements, Apple has requested that the court intervene to prevent OPPO from utilizing these stolen technologies and to hold Chen Shi accountable for his actions. Apple underscores the critical role that health sensor technology plays in its wearable device strategy, emphasizing that this technology leak could have profound implications on the market's competitive landscape.