Whenever I try to install the app on Chrome on my Android phone I get a generic "impossible to install / an error has occurred", with no more info. Any idea what's the problem? I have other web apps installed just fine.
Unfortunately, I don't have any help to offer, but I did want to let you know that it is possible to install on Android from Chrome. I'm replying from mine right now.
Clearing browsing history sounds like a good first step if you haven't tried that yet. Good luck getting it figured out!