EVP phone applications?

I have the Entity Sensor Pro for the android. It records evps and emfand charts the emf. And you can usean app called ringdroid to listen and isolate evps. Check it out.

We used the ghost radar for android as an "experament" device and we loved it. I was skeptical at first but got great results. It works much like the PX or ovulus with a word database. Best of all it has a free version.

I have seen EVP and EMP detectors for the Android and the IPhone, anyone try these yet? They are simple.. I think. I have downloaded an EVP one but haven't gotten a chance to really test it out (i.e. haunted house, empty house). My cats keep interrupting when I turn it on in the apartment.