Android has the same thing, but it makes much more sense - Android has 3 length units: density independent pixels, scale independent pixels (which are used for

Android has the same thing, but it makes much more sense - Android has 3 length units: density independent pixels, scale independent pixels (which are used for fonts, so the user can have a 'huge font' option), and screen pixels. So you can size things in dp, and they will look a similar size on things with different densities. This was built into android from the beginning.