So far, I have read reviews, mind you not from itunes, for Bubu app. It is obvious that English is not the first language of the developer or maybe, it's just me. This app is good as it is free and you don't need to buy add ons if you are not fussy with colours and adding points over the limit. Plus when you only have one kid.
I am not really serious in implementing all the points, rules and rewards but it is a bit fun for the family.