Night Vigil turns the sensors already in your iPhone — magnetometer, microphone, barometer — into a recording field instrument. Anomalies bookmark themselves the moment they happen; the whole session is captured for review: audio plus synchronised sensor traces.
EMF dial and scrolling trace, five-segment field ladder, mic VU, barometric pressure. Every session opens with a 3-second calibration so readings are measured against the room's own quiet baseline — and spike alerts stay off until the field is trusted.
EMF spikes and audio events bookmark themselves at the exact audio offset, with the sensor state attached. You set how sensitive it is. Readings taken while the phone is being handled are ignored.
Play the night back on a timeline with EMF, audio and pressure lanes. Anomalies that coincided with movement on another sensor get called out as likely environmental — a door, HVAC, a passing vehicle. What survives is worth your attention.
Tap a question and a 10-second response region is marked on the recording, with a live countdown while it's open. Re-listen to exactly that window later. And when something happens that no sensor can see — a feeling, a footstep — FLAG it with one button.
Every anomaly is checked against the other channels. A spike that landed with a sound or a pressure change is labelled likely environmental; the readings that stand alone are the ones worth your time. The app does the sceptic's first pass for you.
Drag a clip window around a moment, grade it EVP class A, B or C, and export the clip on its own. Findings live alongside the flags and bookmarks on the session timeline, so nothing gets lost between the hunt and the write-up.
Red, amber or green monochrome over true black, so the screen doesn't wreck your dark adaptation mid-hunt. Haptic cues are silent by design — nothing the app does can contaminate your EVP audio.
Every number on screen is a genuine reading from your phone's calibrated hardware, measured against a baseline taken at the start of your session. Night Vigil never claims to detect ghosts — it helps you find anomalies and rule out the mundane. You collect the data; you decide what it means.
Priced in your local currency on the App Store. Cancel any time in your Apple ID settings.