Based on the users' reviews of the Nail Runner app, here are three pros and three cons, each limited to 15 words: Pros: * Convenient and easy to use, allowing users to track their progress anytime. * Offers personalized coaching, providing custom-made workout plans for each user. * High-quality audio and video tutorials make it easy to learn new exercises. Cons: * Some users find the app's user interface confusing and difficult to navigate. * Limited content and exercises available, leading to repetition and boredom. * In-app purchases can feel overpriced, especially for the premium subscription fees.