iOS: Popular mobile security app Lookout, previously available only for Android, Windows Phone 7 and Blackberry users, is finally available for iPhone, iPod touch and iPad folks. The free app adds protection against privacy and security threats.
Lookout for iOS has several features to protect you and your device, including a Missing Phone service, a notification if your Wi-Fi connection is unsecured, indications of which apps access your location, and auto-backup of your contacts.
Some of these features are already provided by Apple's iOS 5 update (e.g. Find My iPhone/iPad), but Lookout offers some enhancements. For example, the Missing Phone service not only locates your device on a map but also lets out a really loud wail wherever you may have misplaced it (or if it's been stolen). You can also manage both your iOS device and Android or other mobile devices at mylookout.com and sync your contacts with Android devices that also use Lookout.