About Phone App is the best app to monitor phone (or tablet) usage.

You can:
-monitor processor (SOC, CPU, architecture, GPU)
-memory and storage usage; memory (total and available); Internal storage (total and available)
-the battery level and health
-cellular and WiFi signal strengths
-device info (model, brand, product, serial number)
-operating system info. (version, API level, security patch level, uptime, build…)
-display (type, size, resolution, PPI, multi-touch)
-camera (front, rear, video resolution)
-battery info (Connection status, level, health, technology, temperature, and voltage)
-telephony network info (IMEI, SIM state, network type, data connection, and cell information);
-wiFi network info;
-bluetooth support;
-nFC support;
-IR support;
-GPS support;
-fingerprint sensor support;
-supported sensors and
-temperature sensor values.


Monitor status of each phone information category, CPU, memory, storage, battery, cellular and WiFi is shown with colored status bars.