The best replacement for cerberus is hydra.

The best alternatives to cerberus are rated as following:
★★★★★  hydra
★★★★  tengu
★★★  prey
★★★  android device manager
★★  ishtar
★★  chimera
★★  fluffy
★★  sacrilege
★  kayako
★  avast anti theft
★  lookout android
★  wheres my droid
★  cerberus
★  kerberos
  seekdroid

Your alternative for cerberus is not listed? Suggest!
Speaking about cerberus, one probably shouldn't forget about hades.

Other search terms related to cerberus and their ratings are:
★★★★★ hades
★★★ hercules
You have in mind a companion for cerberus and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of cerberus in all years. Click on graph for more.
cerberus
hydra
tengu