We are sorry to inform our users that we can not for the moment support these versions You advise you to upgrade to android 5.0 to get a good experience with the app
I use an old Samsung S2 (GT-I9100) with Android 4.1.2. I find few limitations with it, I can even play the last version of Ruzzle; I have installed Facebook Lite instead of Facebook + Messenger, and Telegram cannot send videomessages, but almost everything else runs fine. The Knil app has some issue starting up, I get this message 3 out of 4 times I start it:
"The connection to the server was unsuccessful (http://localhost:12168/)"
It seems related to the FacebookLite app not being running in the background; when it connects, anyway, it runs fine.