Learn and remember anything with quizzes.
ClueMe is a personal knowledge tool that helps you learn and remember new stuff.
You build and solidify knowledge by creating notes and questions that you later quiz yourself on.
The app is based on the theory of spaced repetition. It's up to you to decide how often you want to repeat a given question (daily, weekly, monthly, quarterly or yearly) based on how well you know the answer.
There are plenty existing questions available to everyone. In addition, you can create your own private questions or share questions with members of a group.