# GhostTrail: EMF Ghost Hunter — Log places that feel wrong

> Log places that feel wrong (iPhone/iPad app by Chih Han Lin.)

- Source: https://appshunter.io/ios/app/ghosttrail-emf-ghost-hunter/id6771639973 (this page in markdown: same URL + `.md`)
- Developer: [Chih Han Lin](https://appshunter.io/developer/1800248325)
- Category: Entertainment, Lifestyle
- Price: Free with in-app purchases
- Age rating: 9+
- Requires: iOS 17.0 · 14 MB
- Languages: English, Japanese, Chinese
- Released: 2026-05-26
- Data updated: 2026-08-03
- User reviews in markdown: https://appshunter.io/ios/app/ghosttrail-emf-ghost-hunter/id6771639973/reviews.md

## What is GhostTrail?

A logbook for places that feel wrong.

Walk into a room that gives you that feeling. Tap once. Hold still for two seconds while the rig baselines. GhostTrail starts reading your phone's magnetometer, accelerometer, and GPS — for up to sixty seconds, or until you tap stop.

You get a pin you can keep on your phone, or share to the World Map so other spotters can see what your phone measured.

WHAT IT IS
• An honest sensor recorder. The readings are what the phone measured. Nothing else.
• A logbook with retro VHS chrome. Each capture earns a tape number, a phosphor-green status readout, and — for curated landmarks — a multi-section lore card you can export as an Instagram Story sticker.
• A curated map of nearly 200 places across six continents — locations known for the kind of stories that make people lower their voice.

WHAT IT IS NOT
• A ghost detector. The app never interprets readings. It logs them.
• A microphone recorder. The permission is never requested.
• A tracking app. No advertising identifiers. No analytics. No third-party trackers.

SIGNALS — THE PEEK ECONOMY
Opening another spotter's public pin costs one Signal. You start with three free Signals, and every pin you publish yourself earns one back — no daily caps, no limits. Out of Signals? Publish your own pins, or buy a Signal pack from Profile → SIGNALS. Three pack sizes: 3, 12 (+25% bonus), or 30 (+40% bonus).

PRIVACY BY DEFAULT
• Captures stay on your phone by default. Nothing leaves the device until you tap SHARE TO WORLD MAP.
• Shared coordinates are fuzzed by ±30 meters before upload. Precise location never leaves the device.
• Sign in with Apple is the only auth method. Apple's private email relay is supported.
• Profile → Delete account permanently removes everything you have shared.

FOUR TIERS OF ANOMALY
Quiet · Stir · Pulse · Surge. The same readings, four amplifications of chrome. Your screen reacts to what the rig is seeing. A haptic pulse fires on every tier crossing. No sound is ever played.

DESIGNED FOR LATE-NIGHT USE
Phosphor green on near-black. Retro VHS scanlines. Monospace timecode. The interface stays out of the way.

REQUIREMENTS
• iPhone running iOS 17 or later
• Magnetometer (every modern iPhone has one)
• Location and motion permissions, granted on first capture
• Camera permission optional — only for photos attached to pins
• Photo Library Add permission optional — only when saving an Instagram-bound landmark sticker

GhostTrail does not detect ghosts. It logs environmental sensor readings as data, not as paranormal claims.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 3 Signals | $0.99 | one-time |
| 12 Signals | $2.99 | one-time |
| 30 Signals | $5.99 | one-time |



## Version history (last 3 releases)

### 1.3.0 — 2026-08-01

A full visual rebuild — and every curated location is now free.

• All 198 curated locations open for free. Signals are now spent only on other hunters' public pins, so the map's own content is no longer behind a paywall.
• New look throughout: a hardware channel selector down the left edge, and every find filed as a paper evidence card.
• The instrument reads the field in colour now — cool, green, amber, red — and shifts live, before you press CAPTURE.
• Map pins carry the same colours, so a find's tier reads at a glance. Curated locations are violet, so they're never mistaken for your own.
• The first-run briefing was rebuilt around the real screens you're about to use.
• Fixed: sharing a capture to the World Map could leave a blank screen once the upload finished.
• Fixed: Signals bought in certain states could go missing instead of being credited.
• Hardened how account and Signal data is protected on the server.

### 1.2.0 — 2026-07-06

A polish, accessibility, and trust pass across the app.

• Camera now asks in context — no surprise permission pop-up on the CAPTURE tab, and a clear recovery if access is off.
• Every Signal purchase shows its result: signals added, awaiting approval, or a one-tap retry. A charged-but-pending purchase reads "Payment received," never a silent failure.
• SAVE TO PHOTOS now tells you honestly whether the save worked.
• New STATS in Profile: lifetime captures and your day streak.
• Map: a LOCATE button and your-location dot, easier-to-tap pins, and the map now opens on your region by app language (Japan / United States / Taiwan).
• REPORT and BLOCK now confirm success or let you retry.
• Full VoiceOver labels on map pins and the Signal indicator, plus larger tap targets.
• Faster photo thumbnails and more responsive buttons with haptic feedback.

### 1.1.0 — 2026-05-26

No release notes.

## More apps by Chih Han Lin

- [GoodPill - Medicine Reminder](https://appshunter.io/ios/app/goodpill-medicine-reminder/id6759840986)
- [KpopLike - Find Your K-Twin](https://appshunter.io/ios/app/kpoplike-find-your-k-twin/id6760238854)
- [GranSample - Granular Sampler](https://appshunter.io/ios/app/gransample-granular-sampler/id6760527944)
- [Pocketext Scan](https://appshunter.io/ios/app/pocketext-scan/id6761661447)
- [SoundMess Lab: SPL Meter](https://appshunter.io/ios/app/soundmess-lab-spl-meter/id6762592034)
- [SpellSynth: Retro Vocal Synth](https://appshunter.io/ios/app/spellsynth-retro-vocal-synth/id6762822700)

All apps by Chih Han Lin: https://appshunter.io/developer/1800248325

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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 2026-08-03.*