Yes, you do need it if you happen to run around cemeteries and various ruins, looking for aberrant electromagnetic frequencies.
:)
Just search for “EMF” or “Tesla” in the iTunes store.
I have some that are pay-for but the free versions work quite well.
[my iPhone is just as bizarre as the rest of my ‘reality’]
:D
I heard the new Samsung or LG phones are better now. Is that true?