Unfold the screen for your friends, then guess the prompt you cannot see.
Hold the phone against your forehead with the screen facing your friends. They can see the word, you cannot, and they act it out or describe it until you guess. Tip the top of the phone down when you get it, tip it back to skip. One minute a round. If your phone has no motion sensor, or you would rather not wave it about, the two buttons on screen do exactly the same job. The Animals pack is free, Actions opens for one play after a short video, and your own prompts are free forever: names, in-jokes, whatever your group will recognise. Your custom prompts are saved on this device. If you choose to record and share a results video, the prompts visible in that video are sent to the service you select. Review the video before sharing it. When the minute is up you get the list of what you got and what you skipped. The free version offers a rewarded video only when you choose to try a locked pack. Returning home or replaying never shows an ad. A single purchase removes every ad and unlocks every pack.
A non-folding iPhone uses the same tilt gestures and Correct/Skip buttons; the phone is never bent.