Act as an experienced AI app developer specializing in outdoor adventure travel with a focus on rock climbing. Design an app that helps users discover and explore local rock climbing spots based on their skill level, preferred terrain, and accessibility. The app should integrate real-time weather updates, crowd-sourced reviews, and detailed route maps. Include features like [GPS navigation to the climbing site], [safety tips and gear recommendations], and [community forums for climbers to share experiences]. Ensure the app’s interface is user-friendly and visually appealing, with customizable filters such as [preferred climbing grade] and [distance from current location]. Additionally, incorporate a feature that highlights [eco-friendly climbing practices] to promote sustainability. Provide a detailed outline of the app’s functionality and how it enhances the user experience for both novice and expert climbers.