Witching Hour is a ghost-hunting app with one strict rule. You give it a recording of a place, the app measures what really happened in it (a light flickering, a knock, something moving), and the "spirit" on the Ouija board can only talk about those measured clues. No evidence, no ghost.

On the Friday before Halloween, I was doing one last test before calling it done. I opened one recording, then switched to a second one. The board started to answer, and something was off: the spirit was talking about the first recording. The app was showing the analysis of the old file, with old data, on top of the new one.

That sounds small, but it broke the one promise the app makes. A spirit that only speaks from evidence is worthless if the evidence comes from the wrong recording.…