Lookout Security & Antivirus
Lookout Mobile Security
Cost: Free ($2.99/month for Platinum service)
Rating: 4.5
Requirements: Android 1.5 and up

Lookout Security & Antivirus protects your mobile device from any sort of outside threat. With security features for adware, malware and virus corruption, Lookout combines mobile security with physical security as it offers anti-theft options as well. Remotely lock, wipe and locate your device for added protection even when you do not have access to it. Lookout also allows you to back up your device, storing your contacts on MyLookout.com to make sure your files are always protected.

With the Premium version of Lookout, customers have more options for device back up—store your media and call history on top of your contacts (which is the only option on the free version). Also, with the Premium version, mobile users can use safe browsing, protecting their devices from phishing sites, and take advantage of Privacy Adviser, which details each app and their ability to gain access to your personal data, text messages and identity information.