From my experience with Android, I know there no longer is a focus (in Android). It once existed, but was partially removed, partially not updated for a long time. So there is no way to highlight the app you want to start. And in places where it still exists, like with many on screen keyboards, it works unexpected. Apps not always support a hardware keyboard or always work in portrait mode, the focus starts invisible at random positions, moving the focus often does not go in the logical direction, etc. In Android, physical keyboard support is a relic from the past, which probably explains why no one is making an Android phone with a keyboard any more. Android has become pointing device only. So don't expect too much from android apps. Jolla has always intended there to be a keyboard other half and even made changes to Sailfish for this specific keyboard. So I expect support to be a lot better, although it's hard to build keyboard support keyboard when no keyboard exits to test it with. I don't know if it will work everywhere, as soon as the keyboard is available the support will improve for Sailfish OS and Sailfish apps. . Unfortunately a standard usb keyboard/mouse does not seem to work on the Jolla. (apparently USB-OTG is not supported) So I can't easily check the current state. On the bright side: The keyboard doesn't only do the things which already exists, it also adds some features. Like alt-tab to switch applications.