클리커 is a training tool invented by Karen Pryor, a renowned animal trainer, based on Pavlov's classical conditioning theory. The Clicker Free app is an Android-based app that is designed for animal training, and its primary function is to train dogs. The app uses the sound of a clicker to signal to the dog that they have performed a desired action, and the dog is rewarded with a treat or toy. The app can be used to train other animals, such as cats, horses, rabbits, and birds.

The app also features a flashlight function that can be used to safely train your pet at night, ensuring that your pet is always safe during training sessions. The app requires access to your device's camera to use the flashlight function.

Overall, the Clicker Free app is a great tool for anyone looking to train their pets in a safe and effective way. It is easy to use and provides a fun and engaging way to train your pets.