A modern iPhone 16-class device includes a neural engine capable of roughly 8.6×10¹² int8 operations per second.1
The owner of the phone solely decides how to use this compute.
Apple, “A17 Pro Chip Specifications”, 2023. https://www.apple.com/newsroom/2023/09/apple-introduces-iphone-15-pro-and-iphone-15-pro-max/ ↩