E lectrical energy is a human need. The greater the use of electrical energy, the greater the costs incurred by the customer. Recording and calculating the power consumption of electrical energy for some customers is still manually so that there are often difficulties when reading the use of electrical energy. An alternative solution to this problem is the use of a digital kWh meter based on an android application that can display the cost of electrical energy used. This study aims to make it easier for users to find out the use of electrical energy and the costs incurred by customers. The data obtained by the user is in the form of voltage, current and power data used during the period of use. In this study, the method of calculating electricity rates is used to determine electrical energy and the cost of electricity tariffs. The circuits of kWh meter monitoring tools is built using a sensor, namely the Pzem-004T sensor. This sensor is used to measure voltage, current and power. The module used for data transmission, we use the Wemos D1 Mini module. Based on the results of the research that has been done, it can function according to commands that have been sent via an android smartphone. Users can monitor voltage, current, power and tariffs on the appliance by using the android application. Users can monitor voltage, current, power and tariffs on the appliance by using the Android application within 0,5 seconds, the monitoring or monitoring subsystem that uses the Wemos D1 Mini module via a wi-fi connection network can run well. Data on voltage, current, power and electricity tariffs from installed loads for 1 month are well read. Testing the Pzem-004T sensor on a load-mounted tool can be detected properly.