If Apple wanted to implement a simlar feature, they would just do it. They wouldn't buy a 3rd party app when they could just do it themselves.
The value proposition of these kind of third party UI apps is that the developer cleverly figured out how to manipulate Apple's APIs to do something Apple didn't really intend. Apple themselves can just write their own private API to do it, they don't need the clever hacks.
The value proposition of these kind of third party UI apps is that the developer cleverly figured out how to manipulate Apple's APIs to do something Apple didn't really intend. Apple themselves can just write their own private API to do it, they don't need the clever hacks.