Comparison

EMF Detector・Ghost Detector vs Ghost Detector

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

EMF Detector・Ghost Detector

Features
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EMF Detector turns your phone into a real-time magnetic field detector. Point it at wiring, a running appliance or a magnet and watch the reading move — a pocket EMF meter that shows what is actually around you, in microtesla (µT) or milligauss (mG). A MAGNETIC FIELD METER YOU CAN READ AT A GLANCE The main screen is a full instrument panel: a large live number, an analog gauge, the X, Y and Z axes, and a rolling 60-second graph so you see the trend and not just the moment. Peak hold keeps the highest value you passed through, and live Min / Avg / Max show what the room has been doing. Switch between µT and mG whenever you like — the same units a gauss meter or gaussmeter shows — and your choice is remembered. Readings fall into three bands so a number means something. Below 60 µT is Typical, 60–100 µT is Elevated, and 100 µT or more shows as a Strong Field — a sign that something magnetic or powered is close. Turn on the alert and the app sounds and vibrates when the reading crosses your threshold, so you can sweep a wall without staring at the screen. FIND THE SOURCE Move slowly past outlets, cables, speakers, laptops, a running microwave, the breaker panel or a fridge door. Used as an EMF scanner the value climbs as you close in, and peak hold marks the strongest spot you found. The built-in Common Readings table lists typical ranges for more than ten everyday sources and highlights the row your reading falls into — so you can tell the Earth's field from something live inside a wall. GHOST DETECTOR MODE For ghost hunting nights, switch to Ghost Detector: a dark, reactive K-II style display — the K2 meter look ghost hunters know — where the same total magnetic field drives a five-level segment readout and an apparition that grows stronger as the field rises. It is free, it uses no separate sensor and no hidden logic — and it is clearly labelled as entertainment. RECORD AND REVIEW Record a session while you walk a room. The app logs a one-second timeline with duration, Min, Avg, Max and Peak, and keeps it in History so you can reopen it, see the chart, rename or delete it. Export a session as CSV — timestamp, x, y, z, magnitude, unit — to keep or share. WHAT IS IN THE APP • Live magnetic field meter in µT and mG • Analog gauge, large readout and X / Y / Z axes • 60-second chart, peak hold, Min / Avg / Max • Typical / Elevated / Strong Field bands • Threshold alert with sound and haptics • Ghost Detector, a free K-II style reactive mode • Always-on spike rejection so the number does not jitter • Session recording with a 1 Hz timeline and statistics • History list, session chart, rename and delete • CSV export through the system share sheet • Common Readings table with live row highlighting • Guide to EMF, reading levels and calibration • Fully offline — no account, no network, no ads HONEST ABOUT WHAT A PHONE CAN MEASURE Your phone has a magnetometer, the same sensor the compass uses. EMF Detector reads the total magnetic flux density near that sensor and nothing else. It cannot measure radio frequency — no Wi-Fi, no Bluetooth, no 5G, no ionizing radiation — because a phone has no RF sensor. The bands help you locate sources; they are not a health or safety verdict, and this is not a substitute for a calibrated professional EMF meter. Ghost Detector is entertainment and cannot identify anything paranormal. For the steadiest reading, move your phone in a figure-8 to calibrate, take off magnetic cases and mounts, and move slowly. Exporting sessions as CSV requires a subscription (weekly or monthly, each with a 3-day free trial). Everything else here — the meter, the bands, the fixed alert, Ghost Detector, the reference table and your three latest sessions — is free. Terms of Use: https://zeroplay.io/docs/legal/terms-of-service Privacy Policy: https://zeroplay.io/docs/legal/privacy-policy

About

Ghost Detector

This app simulates paranormal investigation tools like a radar camera, spirit box, EMF meter, and EVP recorder. It helps you detect and log potential apparitions and communicate with entities. All findings are saved to a case file for later review.

Highlights
  • Radar camera with apparition detection
  • Spirit box with AM radio sweep
  • EMF meter using magnetometer
  • EVP recorder
  • Case file for evidence storage
  • Multi-language support
Read full description

Something is in the room with you. Find it. Ghost Detector: Ghost Box turns your iPhone or iPad into a paranormal field kit — a camera radar that reveals apparitions around you, a spirit box that answers your questions, an EMF meter driven by the real magnetometer, and an EVP tape recorder. Every catch is saved to your own case file. CAMERA SCAN — RADAR AND APPARITIONS • Hold up your phone and turn slowly; the radar shows how close the entity is • Apparitions manifest in the live camera view — the closer you get, the stronger they appear • The moment one shows itself, an evidence photo is captured automatically GHOST BOX SB-33 — SPIRIT BOX • AM radio sweep, 530–1730 kHz, with real static and a voice pushed through a radio filter • Tap a question key, or switch on Listen and ask out loud • Every session has its own entity — a name, a mood and its own way of answering • The entity answers in your language: English, German, French, Spanish, Italian, Portuguese, Russian, Japanese, Korean or Chinese • Silence is an answer too, and the whole session is saved to a log you can share EMF METER EM-33 • Live readings from the built-in magnetometer in microtesla • Needle dial, K-II style LED ladder, history graph, peak hold and reset EVP RECORDER RX-33 • Ghost tapes that unlock as you catch apparitions • Stereo VU meters and tape deck controls CASE FILE • Every apparition is stored with the time and the EMF reading • Share a photo or a Ghost Box session in a tap FREE AND PREMIUM Ghost Detector is free to play: 20 ghost catches a day, 12 Ghost Box replies a day and the standard entities. Premium removes the limits: • Unlimited ghost scans • Unlimited Ghost Box replies • Every entity, including the rarest ones • Evidence photos without a watermark SUBSCRIPTION • Weekly — $3.99 with a 3-day free trial • Yearly — $24.99 Prices are in US dollars and may vary by region. Payment is charged to your Apple Account at confirmation of purchase. A free trial converts into a paid weekly subscription unless it is cancelled at least 24 hours before it ends. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Manage or cancel any time in Settings → Apple Account → Subscriptions. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://thirtythreeapps.com/ios-ghost-detector-privacy-policy FOR ENTERTAINMENT PURPOSES ONLY Ghost Detector: Ghost Box is a simulation made for fun and for a good scare. Ghosts, spirit box replies and radar contacts are generated by the app. The EMF meter shows real magnetometer values, but the app does not detect real paranormal activity. Rated 13+ for horror themes.

Screenshots

EMF Detector・Ghost Detector4 screens
Ghost Detector4 screens

Verdict

The call

The clearest difference is ads: Ghost Detector at none against EMF Detector・Ghost Detector's shown. Ghost Detector also leads on update cadence (every 5 days vs every 3 weeks). EMF Detector・Ghost Detector's advantage is iOS requirement (15.1 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. EMF Detector・Ghost Detector sells 2 in-app purchases, starting at $7.99 per 7 days and Ghost Detector sells 2 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

EMF Detector・Ghost Detector ships an update every 3 weeks, Ghost Detector every 5 days. The most recent releases landed on October 11, 2026 and October 3, 2026 respectively.

Scorecard3 real differences · 6 level
EMF Detector・Ghost Detector versus Ghost Detector: the parameters behind the verdict, then further details
ParameterEMF Detector・Ghost DetectorGhost Detector
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 3 weeksEvery 5 days — better
AdsYesNo — better
In-app purchasesYesYes
Monetization—Freemium
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better17.0
Further details — not scored
Size99 MB84 MB
Age rating9+12+
DeveloperZeroPlay Ltd.Thirty Three Apps

In-app purchases

2 purchases

EMF Detector・Ghost Detector

Subscriptions2
  • Weekly3 Days trial$7.997 Days
  • Monthly3 Days trial$19.991 Month
2 purchases

Ghost Detector

Subscriptions2
  • Premium Weekly3 Days trial$3.997 Days
  • Premium Yearly$24.991 Year

Questions

Is EMF Detector・Ghost Detector free?
EMF Detector・Ghost Detector is free to download, with in-app purchases available.
Is Ghost Detector free?
Ghost Detector is free to download, with in-app purchases available.
Do EMF Detector・Ghost Detector or Ghost Detector have ads?
EMF Detector・Ghost Detector shows ads; Ghost Detector does not.
Which is updated more often, EMF Detector・Ghost Detector or Ghost Detector?
EMF Detector・Ghost Detector ships an update every 3 weeks, and Ghost Detector every 5 days. Most recently, EMF Detector・Ghost Detector was updated on October 11, 2026 and Ghost Detector on October 3, 2026.

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