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 alarm tone. - Keeps track of the iteration numbers. - The notification bar, if you're out of the app will show the interval time and the total time left. - Material dark and light themed - Keep the device awake while timer is running. - Profile system to store your different setups. - Clicker to keep track of ... anything! What's the difference between this and the paid version? Nothing! But I definitely appreciate the support! Please feel free to email me and suggest further features!