Apple Watch Ultra 3 VS DJI Mini 4 Pro
Verdict DROP IT DROP IT
The Reality The feature has a real, documented history of simply not being available to US buyers. After the US International Trade Commission ruled the blood oxygen sensor infringed two Masimo patents, Apple disabled blood oxygen sensing on US-sold Apple Watches in January 2024 to keep selling the watch at all, and it stayed off for roughly a year and a half. In August 2025 Apple restored a redesigned version -- but the workaround processes the sensor's raw data on a paired iPhone rather than the watch itself, and results can only be viewed on the iPhone, not the watch face. The ITC formally closed the case in April 2026, ending Masimo's ability to revive the ban, but the underlying legal fight ran for over two years. US regulators reached a different formal conclusion. Under the 2025 National Defense Authorization Act, Congress required a national-security review of DJI; when no agency completed it by the December 23, 2025 deadline, the law's automatic consequence triggered -- the FCC was directed to add foreign-produced drones and related components, which covers DJI, to its Covered List as posing an unacceptable national-security risk. In practice, this blocks new FCC equipment authorizations for new DJI drone models going forward, though it does not retroactively ban previously authorized drones already owned by consumers, and the Commerce Department has separately signaled plans for rules that could restrict Chinese drone imports further. DJI has disputed the underlying security characterization throughout this process.
SHORT ANSWER
Apple Watch Ultra 3: Apple Watch's blood oxygen feature was legally disabled for US buyers for about 20 months (January 2024-August 2025) after Apple lost a patent case to Masimo, and its restored version now only works by processing data on a paired iPhone rather than the watch itself.
DJI Mini 4 Pro: DJI has consistently denied its drones pose a security risk, but as of December 2025 the US government formally added foreign-made drones, including DJI's, to the FCC's Covered List as an unacceptable national-security risk, blocking new model authorizations going forward.