Cerberus is not available for iPhone but there are some alternatives with similar functionality. The best iPhone alternative is Prey, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 10 alternatives to Cerberus and five of them are available for iPhone so hopefully you can find a suitable replacement. Other interesting iPhone alternatives to Cerberus are iLostFinder (Freemium), SPYBUNKER (Paid), Avira Mobile Security (Free) and Unplug Alarm (Paid).
Avira Mobile Security offers protection and tools that helps you get the most out of your device. Includes a malicious process scanner, battery and storage optimization tools, and utilities to help find a missing device.
Protect your MacBook from theft. Fire an Alarm Siren Sound and Receive a notification when someone tries to steal it. The alarm activates when someone unplugs it from power. Set your options, activate the app, and leave with peace in mind.