Hold the phone flat against your forehead, screen facing everyone else.
They shout clues. They can't say the word, spell it, or rhyme it.
Guessed it? Tip the top of the phone down toward your feet, then bring it back up.
Stuck? Tip it the other way, screen up to the sky, to pass.
Hold it still on your forehead through the 3 · 2 · 1 — that's how it learns your neutral.
If your phone asks for motion access, tap Allow — the game can't read tilts without it.
Round over
Tap any word to flip the call — the score updates.
0 words
Open headsup.html directly in Safari or Chrome. Sensors are blocked when a page runs inside another app's window.
iPhone: Settings → Apps → Safari → Motion & Orientation Access → on. Reload, then tap Allow.
Then use Share → Add to Home Screen. It opens full screen and keeps the permission.
Hold the phone against your forehead the way you'd play, tap Set neutral, then try both tilts.
Waiting for the sensor…
Taps exist only for phones that won't give up their motion sensor.
With no teams, HeadsUP just tracks one score per round. Add two or more and it rotates turns and keeps a running total.
Puts back any starter decks you deleted. Your own decks are left alone.