Just write your question to the oracle. Then touch sphere and wait for the oracle to decide.

That is how it works:

• Start the app
• Enter the question in a matter that it can be answered by yes and no.
• Touch the sphere
• Wait for the answer!

Disclaimer:
This app claims not to be a counselor for life. It just gives you a hint and lets you think about the decision. It´s a little bit like flipping a coin.