So I'm looking to buy a Chromebook that supports Android apps but I use PageDown a lot. On Chromebook in browser it is activated by the Alt+DownArrow. Can anyone comment if it works on Android apps on a supported Chromebook? This a yes or no question. I understand it works in Chrome but that isn't new and I already own one. I only have access to Android devices not chrome OS(with Android Apps installed) so I would like to simply state that the PageDown and Alt+ArrowDown do not work in Android which is not really on topic for this site. Hacks are acceptable.
As per googles support pages, you can install android applications directly onto a chromebook - Google support page for android applications on chromebooks. Please note, it doesn't specifically say you need to be running Chrome OS but this is presumed.
You also need to check that the chromebook you're planning to get, is listed as one of the devices that supports the play store (which is how you install android applications). You can see a list on the Chromium-os site