A live demo is the most effective way to find bugs. For best result let someone else use the app... And don't test the app beforehand, and do not repeat a path/

A live demo is the most effective way to find bugs. For best result let someone else use the app... And don't test the app beforehand, and do not repeat a path/script that you know do work. You do not need tests or static analysis, just demo your app regularly.