Apple Watch Handwashing Detection Has Been in the Works Since Long Before COVID-19
Although watchOS 7 hasnโt (yet) delivered everything we were expecting, Apple did have one interesting surprise up its sleeve in the form of a new handwashing detection feature that will encourage users to wash their hands more frequently, properly, and throughly.
Considering Appleโs very proactive response to the ongoing global health pandemic, itโs easy to think that maybe this feature was something that Apple threw into watchOS 7 at the last minute, but in what now seems surprisingly prescient, it turns out the company has been working on the feature for years.
In an interview with TechCrunch, Apple VP of Technology Kevin Lynch said that this was not in any way a rush initiative undertaken by Apple, but was the result of โyears of workโ โ including much trial and error in order to get it right.
After all, as talented as Appleโs engineers are, thereโs a lot of analysis going on behind this seemingly mundane feature, and in Appleโs typical fashion, it wouldnโt include something like this unless it was sure it could do it right โ and most reports from early testers have suggested that it works brilliantly well.
In fact, this feature follows Appleโs usual style of being the best at introducing a new feature, rather than merely the first one to do so. For example, Samsung released a Galaxy Watch, Hand Wash app a couple of months ago โ clearly in response to the pandemic โ that simply reminded users to wash their hands for at least 20 seconds, adding an extra five seconds for the soap portion of the process.
However, Samsungโs Hand Wash is really just a glorified timer app when it comes right down to it, since all it really does it time how long you wash your hands for, while also keeping track of the number of hand-washings and how long itโs been since you last washed your hands. Itโs an app thatโs the very definition of a slightly crazy niche app that would be the butt of jokes from users were it not for the times we now find ourselves living in.
Appleโs Handwashing
By comparison, Appleโs watchOS 7 handwashing app is an order of magnitude more sophisticated. Far beyond simply providing a countdown timer, the app actually uses the gyroscopes, accelerometers, and even the microphone to detect your hand movements and the sounds of running water in order to confirm that youโre actually washing your hands, and analyze how well youโre doing it.
Itโs also built directly into watchOS 7 rather than being a separate app, and it works much more transparently. For example, users will need to opt in to enable it, but like the fitness tracking features, they wonโt need to do anything to actually start it โ it will simply detect when youโre washing your hands and start the 20-second countdown timer automatically.
As Lynch explains, this works on the basis of the accelerometer, which looks for the specific types of movements the occur when the wearer begins washing their hands, but of course because these can vary a lot between different people, Appleโs engineers had to go through a lot of trials and figure out all of the possible ways that people go about washing their hands.
It turns out, however, that Appleโs team discovered that those movements werenโt enough to guarantee that users were actually washing their hands as opposed to performing other similar activities, so they engaged the microphone to listen both for the sounds of running water and squishing soap to provide additional triggers.
This all gets fed into Appleโs machine learning engine to determine when handwashing is occurring and start the countdown timer along with offering up haptics and โpolite encouragementโ should they pause or cut their handwashing session short.
Apple is also taking this seriously enough that itโs added a new category to its HealthKit framework, allowing you to keep track of your handwashing cycles in the iOS Health app.
By all accounts the arrival of the handwashing app this year was ready to go long before the coronavirus pandemic became a thing, although it certainly seems possible that Apple may have pushed up its inclusion to line up with its other COVID-19 responses, but the key point is that this definitely isnโt a half-baked feature that Apple threw in at the last minute, but something thatโs been well-researched and put together through many iterations over at least the past 2-3 years.
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The long-awaited official iOS 14 update is still a few weeks away from its official release. However, Apple released a public beta version that anyone can download and use before beforehand.
