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Run 16 hardware tests, check specs, CPU & battery health. Offline, no root
Phone Test: Device Info & CPU is a free Android app that tests your phone hardware and shows complete device information. Run 16 hardware tests, read full phone specifications, watch CPU load and RAM live, and check battery health — offline, with no root and no account. It is a hardware tester, a system monitor and a device info tool in one. What hardware can you test? Run a full phone test in a few minutes. The app checks display and dead pixels, multi-touch, flashlight, loudspeaker, ear speaker, microphone, proximity, light sensor, accelerometer, charging, headset jack, vibration, Bluetooth, fingerprint reader, and the volume up and volume down buttons. Every test gives a clear result, so you know which part of the phone still works and which needs repair. Buying or selling a used phone? Test the device before money changes hands. Second-hand and refurbished phones are traded every day in India, Bangladesh, Pakistan, Nigeria, Indonesia, Brazil, the Philippines, Egypt and Kenya, and most are sold with no way to verify condition. Run the hardware test, check battery health and capacity in mAh, confirm the model and manufacturer, and read the real screen and camera specs in under five minutes. How do I check my phone specs? Open the app. The dashboard shows RAM usage, storage, battery status, CPU load and installed app count at a glance. Detailed screens cover: CPU and GPU: architecture, supported ABIs, core count, live CPU frequency and governor, GPU renderer, vendor and version. Reads Snapdragon, MediaTek Dimensity, Exynos, Google Tensor and Unisoc chipsets. Battery: health, temperature, voltage, capacity in mAh, live power draw in watts and current in mA, power source and cell technology. System: Android version, API level, security patch level, kernel version, bootloader status, build fingerprint and skin version such as One UI or HyperOS. Network: IP address, gateway, subnet mask, DNS, Wi-Fi standard including Wi-Fi 6, 6E and 7, link speed, plus Bluetooth, NFC and UWB support. Display: resolution, pixel density in DPI, refresh rate in Hz, HDR support, physical size and brightness. Memory and storage: RAM type and frequency with live usage, and a breakdown of used and free space. Sensors: every sensor on the phone with vendor, type, power draw and wake-up status. Camera: front and rear aperture, focal length, ISO range, RAW support, face detection and true resolution. Apps: version, target SDK, permissions, activities and services, plus a built-in APK extractor to back up any installed app. Is it free, and does it need root? Yes, it is free, and no, it does not need root. There is no sign-up, no account and no login. Specifications are read from the phone itself, so the app works offline with no internet connection. Who uses this device info app? Gamers checking thermals and refresh rate. Repair technicians confirming a faulty speaker or digitiser. Developers reading API level and target SDK. Reviewers verifying advertised specs. Buyers and sellers checking a second-hand handset. Frequently asked questions How do I test my phone speaker and microphone? Open Tests, choose Loudspeaker, Ear Speaker or Microphone, and follow the prompt. How do I check battery health on Android? Open Battery. The app reports health, capacity in mAh, temperature, voltage and live power draw. How do I find dead pixels on my screen? Open Tests and run the Display test. The screen cycles through solid colours so dead or stuck pixels stand out. Does it work on any Android phone? Yes — Samsung, Xiaomi, Redmi, realme, OPPO, vivo, OnePlus, Motorola, Infinix, Tecno, Nokia, Honor, Poco and Google Pixel. Can it tell if a used phone matches its advertised specs? It reports what the hardware declares — model, chipset, RAM, storage, sensors and cameras — so you can compare that against the listing. Readings come from the Android system and vary by manufacturer; some values are not reported on every device.