Nightwatchfield kit
Sensor off
0.0mG
Background
0 to 1.5
1.5 to 2.5
2.5 to 10
10 to 20
20 plus
Hold the phone still for clean readings
0.0Peak
0.0Average 30 s
--Total field µT

Anomaly radar

Contacts are plotted in the direction the phone faced when a spike was detected. Stronger spikes sit closer to the center.

Heading --
  • No contacts yet. Sweep the room slowly.

Live graphs

EMF, device motion and sound level on one timeline. Spikes that line up across lanes are worth a closer look.

0.0Min mG
0.0Max mG
0.0Avg mG
Raw magnetometer--
--X µT
--Y µT
--Z µT
--Baseline µT
--Motion m/s²
--Rotation °/s

EVP audio

A live spectrogram of the microphone from 0 to 8 kHz. Voice band activity above the room baseline is logged automatically.

Sound level-- dB
Voice band vs baseline--

Recordings

Play clips forward and in reverse. Recordings stay on this page until you save them.

  • No recordings yet.

Spirit box

A frequency sweep noise generator. It sweeps filtered static in short bursts, the way a sweep radio does. Record with EVP running to review later.

87.5FM
889296100104108

Spirit camera

Camera with night filters and motion detection. Changed pixels glow red. Keep the phone still or on a surface.

0.0 mG
--
Motion 0%
Camera is off
Snapshots appear here.

Session log

Nothing recorded yet.

  • Events from every tool are listed here with time, value and direction.

Setup

Tune detection and check which sensors this phone supports.

Alert toneBeeps faster as the field gets stronger
VibrationBuzz on light 4 and 5
Screen flashRed edge glow on light 5
Keep screen awakeStops the phone sleeping mid session
Show µT instead of mG1 µT equals 10 mG
Demo modeSimulated readings for practice when no magnetometer is available

Sensor check

Quick guide

Getting started
  1. Open this page over HTTPS in Chrome on Android.
  2. Tap Begin session and allow motion, microphone and camera when asked.
  3. Put the phone down away from electronics for 2 seconds, then tap Calibrate on the Meter screen.
  4. Walk slowly and hold the phone flat and still between steps.
Magnetometer shows as unavailable

Chrome keeps raw magnetometer access behind a flag. Open chrome://flags/#enable-generic-sensor-extra-classes, set it to Enabled, relaunch Chrome and reload this page. The page must be served over HTTPS (localhost also works). iPhones do not expose the magnetometer to web pages, so use Demo mode there.

Reading the five lights

Lights fill from left to right like a K2 meter: green 0 to 1.5 mG is background, second green 1.5 to 2.5 is low, yellow 2.5 to 10 is mid, orange 10 to 20 is high and red above 20 is extreme. Readings show change from your calibrated baseline, so the Earth's own field is removed.

Avoiding false positives
  • Watch the steadiness line under the lights. Rotating the phone shifts the reading on its own.
  • Phone cases with magnets, chargers, speakers, wiring and metal furniture all cause real spikes.
  • Recalibrate each time you enter a new room.
  • Trust events that appear on several tools at once, such as EMF plus audio.
Using the tools together

Run EVP listening in the background, then switch to Radar or Meter. Every tool keeps working while you move between screens, and every event lands in the Session log with its compass direction. Export the log as CSV for a spreadsheet or JSON for backup.

Nightwatch field kit

EMF meter, anomaly radar, live graphs, EVP recorder, spirit box and spirit camera in one page.

Readings come from your phone's real sensors. Your phone will ask for motion, microphone and camera access as you use each tool.

Mark event

Saved with the current reading and direction.