Here are some ESP/Zener Cards for you to test a subject. Simple but effective. Choose a card. Challenge them to guess which one you chose!
It simply contains the following (standard) ESP cards:
- Wavy lines
Swipe between the cards to change. Tap once to select the card. Tap again to turn it over. Tap a third time to return it to the deck.
I am an amateur app developer and welcome feedback or suggestions!