Notification app for FB, YT, Twitter

Hello, I need to make android app. It will be display new fb post from fanpage, new video from yt and new tweet from twitter. User can make bookmark and name it, for example "one" then user will assign fb,yt,twitter and he/she will see any new activities of chosen account. App will be expanded with bigger budget. I hope everything is clear. If something is unclear please ask.