The best replacement for balance board is wobble board.

The best alternatives to balance board are rated as following:
★★★★★  wobble board
★★★  bosu
★★  bosu ball
★★  wii fit plus
★  action board
★  wii fit
  wii fit plus balance board

Your alternative for balance board is not listed? Suggest!
Speaking about balance board, one probably shouldn't forget about wii.

Other search terms related to balance board and their ratings are:
★★★★★ wii
★★★★★ wii u
★★★★★ wii fit
★★★ wii fit plus
★ buying wii fit
★ wii console
★ biggest loser
★ wii active
You have in mind a companion for balance board and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of balance board in all years. Click on graph for more.
balance board
wobble board
bosu