《Lookout Security & Antivirus》App 是其中一个最受欢迎的手机防毒保安 App。
Lookout App 有两个主要功能。第一是防毒，可以拦阻 Malware, spyware 等，亦会扫描手机档案。
另一个功能是 Find My Phone，只要配合 lookout.com 网站就可以透过电脑或其他的浏览器找寻遗失的手机。但 Find My Phone 有一个限制，就是手机无电，就未能配合运作。
而新推出的 3.0 版本，就增一项名为 Signal Flare 功能。当手机处于低电量时，就会自动记录手机的当前位置。若手机之后丢失并无电，Find My Phone 功能未能用上，也可有一个手机的最后位置记录，增加找回手机的机会。
Lost Phone + Dead Battery = No Problem
Dead batteries are a sad fact of mobile life these days. In fact, we found that 30% of people are unable to recover their lost phone because of a dead battery. At Lookout, we got “fired up” to solve this problem! Signal Flare is a first-ever capability that automatically flags your phone’s last known location when the battery gets really low, significantly improving your chances of getting your lost phone back.
除了 Signal Flare外，3.0 版本亦改动了版面的设计，并有 Activity Feed 展示软件保护手机，拦阻不同病毒威胁等资料。
