Usage: System Activity Monitor is an iPhone app designed to track the system's activity and performance. It offers detailed insights into disk usage, RAM status, and network activity through clear history graphs and informative tabs. The app provides customizable widgets for instant usage insights and allows users to configure graphs according to their preferences.

With cloud sync functionality, users can seamlessly sync data across their devices. Usage prides itself on being lightweight yet efficient, offering robust diagnostic tools to monitor device performance while ensuring user privacy by not tracking or sharing any data. Users can unlock advanced features with a Pro subscription, granting access to more comprehensive data insights.