This is a simple timer that counts down in a set interval designed for Behavioral Analyst and the likes. It was made for individuals who need a timer for things such as lab experiments, tracking an item or schedule of reinforcements. Features: - Set an interval that counts down until the main timer runs out. - You may set a "limited hold" every after interval. - Set random interval values from a certain range. - Make random values deviations from interval time - Set vibration patterns. - Set al