The best replacement for metronome is drum machine.

The best alternatives to metronome are rated as following:
★★★★★  drum machine
★★★  cat
★  neurofeedback
  guitar pro
  cogmed

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

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



Google Trends

Scale is based on the average worldwide traffic of metronome in all years. Click on graph for more.
metronome
drum machine
cat