Back taps seem to be the new cool thing in the mobile business, as everybody is currently working on bringing such functionality to their mobile devices.
It all started with Google, as evidence of the search giant developing a feature that would allow users to launch certain apps by simply tapping devices on the back were discovered in early 2020. Google internally codenamed the feature Columbus, but no information as to when such functionality could go live on Android phones was available at that point.
But of course, the next-generation Pixel is very likely to introduce it, especially as Apple is working on something similar for the iPhone too.
iOS 14, the iPhone software update due in September, will allow users to tap on the back of the smartphone to launch apps, activate the torch, or wake up Siri, and the whole thing works even when a case is on.
Xiaomi joining the party too