DataMeter is a lightweight dataflow monitor widget for iPhone that allows users to track their data usage in real-time. With its fast and convenient features, this widget is designed to help users save money and stay in control of their data usage.

The widget provides users with quick access to their data usage information right on their lock screen, drop-down screen, and Notification Center. This allows users to easily monitor their cellular (2G, 3G, 4G) and WiFi data usage without any delays.

One of the cool features of DataMeter is the ability to click on the cellular traffic areas in the Notification Center to open or close the mobile cellular switch. This provides users with the flexibility to manage their mobile data connection with just a few taps.

DataMeter is also power-efficient, as it does not run in the background. This ensures that it does not drain the device's battery while still providing accurate and up-to-date data usage information.

The app presents the dataflow traffic for both cellular networks (2G, 3G, 4G) and WiFi in a clear and easy-to-understand manner. Users can view monthly summary charts that clearly show their data usage patterns and help them identify any excessive usage.

With its precision and adaptability, DataMeter ensures that users have accurate data usage information without any delays. The data is displayed in Byte units and automatically adapts to the appropriate B, M, or G unit depending on the scale of the usage.

Overall, DataMeter is a useful tool for iPhone users who want to monitor and manage their data usage effectively. Its fast and convenient features, coupled with its clear presentation of data, make it a valuable widget for those who want to save money and stay in control of their data usage.