Cloud Battery is a free utility and tool app developed by Alan Yan. It is specifically designed to provide a better battery management system for Apple devices. It allows you to monitor your Apple device battery levels from anywhere, as long as you have the app installed on all devices that share the same iCloud account.

This app is easy to use and seamlessly integrates with iCloud, minimizing setup time. It provides multiple ways to keep up with battery levels, such as notifications, home screen, lock screen widgets, Watch complications, and standalone apps for iOS, macOS, and watchOS.

Cloud Battery also offers real-time battery monitoring for all your devices, including Apple Pencil and BLE Battery Tracking for Magic Mouse/Trackpad/Keyboard support on macOS. Additionally, it features Siri Shortcuts integration, low battery notifications, and unplug notifications. With frequent refreshing, your device battery levels are always up to date.

Overall, Cloud Battery is a comprehensive solution for managing your Apple device batteries, providing real-time monitoring and multiple ways to keep track of battery levels.