Android spyware is malware built for Android phones and tablets that secretly collects data or watches what a user does. It may record calls, read messages, capture keystrokes, steal files, track location, or monitor installed apps. Unlike obvious disruptive malware, spyware is designed to stay hidden so it can harvest information over time.
It matters in cyber security because mobile devices often hold email, authentication codes, contacts, and business documents. Attackers commonly deliver Android spyware through phishing links, fake app installers, trojanized apps, or permission prompts that seem harmless. Defenders look for risky sideloading, unusual accessibility or device-admin permissions, unexpected network traffic, and apps that request access beyond their role. Mobile security controls, user training, and app vetting help reduce the chance of covert surveillance.