Forest is an example of gamified app using tree planting as the key gamification concept. It helps users to stay focused on their tasks without distractions like social media. While the users are working on a task, they “plant a seed” that may grow into a mighty tree. Or may not — if they succumb to temptation and interrupt the activity, the tree will wither. The more focused they are, the more trees they can grow, and eventually turn into a forest.