Guides

Step-by-step checklists that chain our free browser tools together for a specific job.

How to Test a Used Laptop Before Buying A 10-minute browser checklist — battery, screen, keyboard, camera, audio and GPU — to run before you pay a seller.
How to Test a Used iPhone Before Buying Activation lock, IMEI, battery health, burn-in, touch, cameras and sensors — the two checks that can make a phone worthless come first.
How to Test a Used Monitor Before Buying Dead pixels, backlight bleed, OLED burn-in, real refresh rate, colour and ports — the faults you cannot see on a normal desktop.