Wondering if I can get in on the friend bonus action to maximise dosh supplies. I have signed in to the game with facebook, but I see people here mentioning Game Centre?

I play on Android (Sony Experia Z) 4.2.2 - is game centre an IOS thing? Do I need to add folk here to my facebook to benefit from bonuses, or can I switch to game centre?

Does anyone have any advice on this, how I can utilise friend bonuses?

NB I have some Facebook friends who play, but they are all about 5% through it and don't really play often.

Thanks.