In pictures: 8 essential Android security apps

A DIY guide to securing Android-based devices

Advanced Task Killer

Developer: ReChild Price: Free

This final application isn't really a security app per se, but it's certainly something IT departments will want people using company smartphones and tablets to have since it will help them save both memory and battery life on their devices. This way fewer people will send you trouble tickets reporting poor device performance because they've unknowingly left "Angry Birds" running for three straight weeks.

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