Phone Checker: Device Test

Phone Checker — Guided Phone Hardware Tests

Buying a used phone? Selling yours? Phone Checker runs a guided check of the whole device — screen, sound, sensors, cameras, buttons, GPS, battery, charging port and radios — and builds a clear health report you can save or share.

Built natively in Kotlin with a clean, dark design — fast, lightweight and private. Every test runs on your device, and nothing from a test is ever uploaded.

QUICK CHECK OR FULL INSPECTION
• Quick Check runs 9 essential tests in about 2 minutes
• Full Inspection runs all 29 tests in about 7–11 minutes
• Mark each part Working, Not working, or Skip
• Hardware your phone does not have is reported as Not available — never as a pass
• Finishes with a complete Phone Health Report

WHAT IT TESTS
• Screen: touch dead zones, dead pixels, multi-touch, refresh rate, brightness
• Sound: loudspeaker, earpiece, headphones, microphone, vibration
• Sensors: proximity, light, accelerometer, gyroscope and compass, with live readings
• Cameras and more: front and rear preview, flashlight, fingerprint, volume buttons
• GPS with live satellite count and location fix
• Charging port, SIM card, Wi-Fi, Bluetooth and NFC
• A radio that is simply switched off is never counted as broken

MEASURED, NOT GUESSED
• Storage speed — the phone writes and reads a real file and reports MiB/s
• Speed under heat — every core worked for 20 seconds to see if the phone holds its speed
• A phone that cannot shed heat looks perfect in every other test, because they all finish too fast

BATTERY HEALTH
• Estimated health — how much of its original capacity the battery still holds
• Charge cycles, on phones that report them
• Live level, temperature, voltage and charging current
• Says plainly when a phone does not report capacity, instead of guessing a number

PHONE IDENTITY CHECK
• Checks whether everything the phone says about itself agrees
• A renamed phone can change its model name, but not its chip or its core software
• For the models that get copied most, it also checks the memory, cores and chip
• Tells you if the phone is rooted or its bootloader is unlocked
• It never calls a phone fake. It shows the facts and lets you decide

FULL DEVICE INFO
• Live, searchable sections for hardware, battery, system, cameras, sensors and network
• CPU clocks per core, GPU renderer and driver, camera capabilities, sensor specifications
• Recent graphs for CPU clock, RAM use, battery temperature and current
• Clearly labelled GB and GiB units, advertised versus usable RAM

SAVED CHECKS AND REPORTS
• Every check you finish is kept on your phone
• Open an old report any time and share it again
• Each one shows the battery health from that day, so you can see it change
• Share the report image on WhatsApp in one tap — great for used-phone listings

100% PRIVATE — ON YOUR DEVICE
• No account, no sign-in
• Test results and reports never leave your phone unless you share them
• Camera is preview-only; the mic reads a level and never records
• No location, no photos, no audio are ever uploaded

HONEST BY DESIGN
Phone Checker will not let a missing part be marked as working. If your phone has no gyroscope, or a test cannot reach the hardware, the report says so plainly instead of counting it as a pass — and components your phone does not have are left out of the score rather than held against it.

It reports only what the phone tells software. Battery health is an estimate, and not every phone reports it. It cannot detect water damage or motherboard faults — so it never claims a phone is "perfect." Use it as a fast, reliable check, not a guarantee.

Official apps by APPNEST
🌐 https://appnest.live

Recent changes:
• New Device screen: live CPU, GPU, camera, sensor and network details, with graphs
• Open the matching test from any detail, and come back where you were
• 9 new tests, including charging port, SIM, Wi-Fi, storage speed and speed under heat
• Tells you if the phone is rooted or its bootloader is unlocked
• A radio that is only switched off is never counted as broken
• Fixed the vibration and microphone tests on older phones

Thank you for using Phone Checker! 💚