knowLedge
knowLedge is a learning tool which helps you in improving your knowledge in the easiest possible way. All you have to do is start playing and answer the questions. Choose the answers from the choices and the app will respond whether it is the right answer. If it is not, it educates you the right answer. The app will keep asking you the question at the right interval until you are familiar with that. It also increases the complexity as you progress until you completely master it.
You can track overall progress at any time in app and todays progress in widget. As of now, the app covers general knowledge about the USA.