Ghost Detector: Spirit Tracker is a free iPhone app developed by Digital Bananas LLC. This app mimics the four most important technologies used to detect paranormal activity. It offers a range of features that can provide users with a thrilling ghost hunting experience.

The app includes a radar feature that detects any irregular energy or fluctuations in the environment. By transmitting a signal through radio waves, the radar can pick up distorted, unstable, and abnormal signals, alerting users to potential paranormal activity.

Another feature of the app is the EMF detector, which finds electron vibrations in a given area. Similar to a radio antenna, this detector can help users identify areas with high electromagnetic energy, often associated with ghostly phenomena.

In addition, Ghost Detector: Spirit Tracker utilizes infrasound and EVP technology. Infrasound refers to sound that is lower in frequency than what humans can normally hear. This app can pick up on these low-frequency sounds, often associated with paranormal occurrences. EVP, or electronic voice phenomena, are sounds that can be found in background noise, resembling static. This app can detect and capture these odd sounds, adding to the ghost hunting experience.

Lastly, the app features an ion detector, which can identify positive and negative ions within an electric field. It is believed that high amounts of positive electromagnetic discharges can be attributed to paranormal activities. The ion detector in Ghost Detector: Spirit Tracker can help users identify areas with unusual ion levels.

It is important to note that Ghost Detector: Spirit Tracker is made for fun and entertainment purposes only. It is not intended to be a scientific or professional ghost hunting tool. However, for those interested in the paranormal, this app provides an engaging and immersive ghost hunting experience.