Russell Targ's App “ESP Trainer”. In case anyone wasn't aware he had a practice app out there. I do best when I place a finger over each square & pay attn to
ESP Trainer Premium - Apps on Google Play
Stargate ESP Trainer | App Price Intelligence by Qonversion
Sabrina's ESP TRAINER Pokemon card Japanese Nintendo RARE Free Shipping | eBay
Improving my psychic ability with the free ESP Trainer app! | PeakD