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Apple to Limit Accelerometer and Gyroscope Access in Safari on iOS 12.2 for Privacy Reasons
The upcoming software update also introduces a new Motion & Orientation Access toggle under Settings > Safari > Privacy & Security. Toggled off by default, this new setting must be turned on in order for websites to display features that rely on motion data from the gyroscope and accelerometer in the iPhone, iPad, and iPod touch.
To test this, we loaded the What Web Can Do Today website on an iPhone running the first beta of iOS 12.2. With the Motion & Orientation Access setting toggled on, the page shows real-time accelerometer and gyroscope data from the iPhone. With the setting toggled off, no motion data is shown.
Another example is Apple's motion-based iPhone experience site. This page normally allows you to tilt your actual iPhone to swivel the iPhone XS Max on the screen with tech specs. With Motion & Orientation Access toggled off, however, only a static image of the iPhone XS Max is shown without tech specs.
This privacy-focused change could be in response to a WIRED report last year that claimed thousands of websites have unmitigated access to motion, orientation, proximity, and light sensor data on mobile devices. Software engineer Felix Krause also filed a radar and notified Apple's security team about this matter in 2017.
As noted by Digiday, the setting could have implications for AR/VR advertising:
For example, Samsung's "Samsung Within" web-based interactive experience, developed by R/GA to promote the hardware brand's legacy and its Galaxy Note 9 phone, uses the accelerometer to let people explore the night sky.These AR/VR experiences may have to rely on fallback versions that people can navigate with swipe gestures instead, but this largely defeats the purpose of motion-based, interactive campaigns.
"It's definitely going to break things," said Kai Tier, executive technology director at R/GA.
It's quite possible Apple could tweak how this feature works in time for the public release of iOS 12.2. Perhaps the setting will be toggled on by default in a subsequent beta, for example, or Safari could prompt users for permission to access motion data when necessary as it does with location data.