Knowable is a free Android app that offers comprehensive audio courses in various categories, including personal development, business, and wellness. The app features the world's most trusted experts to provide users with high-quality content that can be accessed anytime, anywhere.

The courses come in an audio format, making them easy to listen to and learn from. Each course is divided into bite-sized lessons, and users can track their progress as they complete each lesson. The app also offers a personalized learning experience, where users can choose courses based on their interests and goals.

Overall, Knowable is a great app for those who want to learn on-the-go and from the best in their field. The app is user-friendly, and the content is informative and engaging. However, it is worth noting that some courses require a subscription fee, which can be a drawback for some users.