The bottom navigation keys on Android phones have evolved several times, and now, with the popularity of full-screen gesture slots, the presence of navigation keys is becoming less and less. Some Android users may recall that the “menu key” used to be an important interactive hub for Android phones, but now it’s all but gone.
For apps developed for Android 2.3 and even older systems, before Android 9, Google allowed the “menu” key to activate more settings on these apps in the navigation bar, but Android 10 decided not to do so.
Google says the API mating for the changes is already in place. In other words, if you run these old apps on Android 10, you won’t be able to exhale menu options, and Google stresses that the actual impact will be extremely small.
Currently, the App for Android relies primarily on the Hamburger button or “…” to call out the menu option.