E-test is an Android application developed by JackTang. It falls under the Utilities & Tools category and is available for free.

E-test allows users to monitor the running status of their energy meter in real-time. The app provides a graphical representation of voltage, current, power, and other relevant data in the form of curves. This allows users to easily track and analyze the performance of their energy meter over time. With E-test, users can gain valuable insights into their energy consumption patterns and make informed decisions to optimize their electricity usage.

Overall, E-test is a useful tool for individuals who want to closely monitor the performance of their energy meter and make informed decisions about their energy usage. Its intuitive interface and real-time data visualization make it easy for users to track and analyze their energy consumption patterns.