Battery Level is a free iPhone app developed by Kenneth Kao. It provides users with the ability to monitor their device's battery percentage and system status. With over 1,600,000 users, Battery Level has become a popular choice for those who want to keep track of their device's battery life.

The app offers a simple and intuitive interface, making it easy for users to quickly check their battery percentage. In addition to displaying the current battery level, Battery Level also provides information on CPU usage, CPU activity graph, system uptime, and RAM monitor. Users can easily monitor wired, inactive, active, and free memory, allowing them to optimize their device's performance.

Another useful feature of Battery Level is the network monitor, which displays network usage. This feature is particularly helpful for users who want to keep track of their data usage or monitor their network connection.

Overall, Battery Level is a handy utility tool for iPhone users who want to keep an eye on their device's battery percentage and system status. With its user-friendly interface and additional features like CPU usage and network monitor, Battery Level provides valuable information to help users optimize their device's performance.