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 four alternatives to Rex for a variety of platforms, including Mac, iPhone, iPad, Snapcraft and Chrome OS apps. The best Rex alternative is Prey, which is free. Other great apps like Rex are Beepify, 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.
Need to leave to the toilet while working on your laptop from a cafe? Beepify lets you do just that! If someone tries to steal your laptop, Beepify detects it and sounds an alarm and send you a push notification, so you can capture the bad guy!
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.
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