If you searched for wavelength online with friends, you probably want to know two things: whether the game works across separate homes, and who should control the board. It does. Wavelength is naturally suited to a host-and-call format because the fun comes from the clue debate, not from every player owning a separate board.
One person opens the free Wavelength game online, shares the board when the target is hidden, and keeps the target private during the clue and discussion. Everyone else joins the call, listens to the same two endpoints, argues about the clue, and agrees on one final position. The host reveals the target and records the score.
This guide focuses on a friend group that already has a call or group chat. It is different from the public Wavelength with strangers guide, which needs moderation and safety rules, and different from the no-board Wavelength setup, which explains how to replace the physical game with paper or a phone.