There's more to mobile apps than ringtones, text messages and casual games: "Intended to promote a UK TV show called 'Derek Acorah's Ghost Towns,' the detector - co-developed with mobile specialist Future Platforms - purportedly uses existing mobile phone technology and 'current parapsychological theory' to 'detect subtle electrical changes around the user that some experts say are associated with paranormal activity,' says Wiretown co-founder Tim Usborne."