# Signal Watcher — Environmental Anomaly Scanner

> Environmental Anomaly Scanner (iPhone/iPad app by Jayron Martinez.)

- Source: https://appshunter.io/ios/app/signal-watcher/id6778145690 (this page in markdown: same URL + `.md`)
- Developer: [Jayron Martinez](https://appshunter.io/developer/892254824)
- Category: Utilities, Reference
- Price: $4.99
- Age rating: 4+
- Requires: iOS 17.6 · 2 MB
- Languages: American English
- Released: 2026-07-04
- Data updated: 2026-07-28
- User reviews in markdown: https://appshunter.io/ios/app/signal-watcher/id6778145690/reviews.md

## What is Signal Watcher?

Watcher is a precision environmental anomaly detector that runs entirely on your device.

Using your iPhone's microphone, motion sensors, magnetometer, and hardware random number generator, Watcher continuously monitors for statistically significant deviations across multiple independent channels — then correlates them into a single anomaly score in real time.

WHAT IT MONITORS

· Audio — ambient RMS level, spectral centroid, sub-100Hz infrasound energy, dominant low-frequency Hz
· Motion — jerk magnitude, micro-tremor index, somatic pattern detection
· Magnetic Field — deviation from a locally-learned baseline, with automatic compensation for static field sources
· Hardware RNG — chi-squared, runs test, and monobit frequency analysis on live entropy samples

HOW IT WORKS

Watcher builds a location fingerprint of your environment over time. Once calibrated, it scores incoming sensor data against that baseline — not against a generic threshold. What's anomalous in a quiet room may be normal in a subway station. The app learns the difference.

When multiple independent channels spike simultaneously, Watcher flags a correlated anomaly — the kind that can't be explained by a single known source.

PRIVACY

Everything stays on your device. No network connections. No analytics. No third-party SDKs. Raw sensor data is processed and discarded in real time — only derived scalar values are retained locally.

WHO IT'S FOR

Environmental researchers, field investigators, and anyone who wants to know when something in their surroundings has measurably changed.


## Version history (last 1 release)

### 1.0 — 2026-07-04

No release notes.

## More apps by Jayron Martinez

- [Catch That Plátano!](https://appshunter.io/ios/app/catch-that-platano/id892254821)
- [DidYou - Home Checklist](https://appshunter.io/ios/app/didyou-home-checklist/id6771498811)

All apps by Jayron Martinez: https://appshunter.io/developer/892254824

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-28.*