Sensor Charts: Sensors Multitool is a free Android application developed by DevNetPlanet that records all sensor data in the background and presents it in colorful charts. It supports a wide range of sensors such as pressure, magnetometer, light, battery, battery temperature, battery voltage, proximity, memory, RAM, compass, step counter, and screen brightness.

This application works from Android 4.4 (Kitkat) to the latest Android 9.0 (Pie) and displays time ranges in pie charts and historical data by day and month in linear charts. You can zoom on charts with two fingers and check your battery's performance or when it was discharging very fast. Additionally, you can set alerts for your sensors, making it a personal tricorder. If your device has a step counter, Sensor Charts can estimate the distance traveled and calories burned. The app supports several units of measure, including hPa, inHg, mmHg, psi, lux, fc, °C, °F, °K, km, and miles.

Overall, Sensor Charts: Sensors Multitool is an excellent application that helps you understand your device's sensors' performance. It is a must-have tool for anyone who wants to monitor their device's sensors' data and check their performance over time.