Rex is described as 'Protects your MacBook from theft. It knows if you're packing up and disarms itself. Re-arms when you next open your MacBook. Sends real push notifications. Doesn't fail if you forget your headphones plugged in' and is an app in the security & privacy category. There are three alternatives to Rex for a variety of platforms, including iPhone, Mac, Android Tablet, iPad and Android apps. The best Rex alternative is Prey, which is free. Other great apps like Rex are Track My Mac and Unplug Alarm.
Prey offers a decade of experience in device tracking and security tools to protect laptop, phones, and tablets across multiple OS.
Track My Mac from MacKeeper developers is a fast and easy way to find your missing Mac. In case of loss, the app will detect your Mac’s current location, make a photo of the thief or intruder, and send this data directly to your iPhone.
If unplugged or closed, triggers a loud siren, works even when muted, captures a photo, and sends push notifications and images to your mobile device via subscription, protecting your MacBook with selectable settings, trial, and both purchase options.
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