A free app for Android, by Initial Seed.

If you like horror movies, you might wanna download this. It includes tools to capture ghosts.

With this application, you can hunt all the ghosts that have delighted in places through which passes, but you can also find out if you have some unseen companion in your room, would you dare to hunt one at home?

Ghost hunters Kit is a paranormal investigation tool for Android. It is used to detect the presence of ghosts, spirits, or other unknown entities. It includes different sensors and tools to detect any paranormal activity. 

You can use any of the tools available: an EVP sensor, a meter for detecting electromagnetic fields (EMF), a night camera, and a spirit detector. The EVP sensor is used to record any EVP (Electronic Voice Phenomena). The sensor works by detecting the difference in frequency between the pre-recorded and the captured audio.