The best replacement for ubr is acs.

The best alternatives to ubr are rated as following:
★★★★★  acs
★★★★  prs
★★★★  ctr
★★★  vbr
★★★  emod
★★  str
★★  sopmod
★★  f93
★  vltor emod
★  acs-l
  ergo f93
  vbr nrt

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

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



Google Trends

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ubr
acs
prs