A Dropper App is a type of malicious software designed to secretly install other malware onto a device. Often disguised as legitimate or popular applications, dropper apps bypass security measures to deliver harmful payloads such as spyware, ransomware, or trojans. Once installed, they can compromise user data, device functionality, or security without the user's knowledge. Dropper apps are a common method cybercriminals use to spread malware on computers, smartphones, and tablets, making it crucial to download software only from trusted sources.