Comparison

Ghost Detector EMF Scanner vs Harmonograph

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

Head to head
About

Ghost Detector EMF Scanner

This app uses your device's sensors to detect electromagnetic field anomalies, simulating paranormal activity. It features a real-time radar, ghost identification, and a soundboard for an immersive entertainment experience.

Highlights
  • Real-time EMF radar
  • Ghost identification (names, types, danger levels)
  • Spooky soundboard with sound effects
  • Haptic vibration feedback
  • Dark night-vision interface
Read full description

Hold the phone steady. Watch the meter. Listen. Ghost Detector turns your phone into a paranormal investigator's pocket toolkit. The EMF scanner reads the magnetometer field around you and pulses when something shifts. The spirit box cycles voices the room should not have made. The EVP recorder captures what you cannot hear on your own. WHAT THE METER SHOWS The needle answers the room. Calm fields stay green. Spikes climb yellow into red. Some spikes have explanations. Some do not. You will learn which is which. SPIRIT BOX Three hundred and twenty three voice clips cycle through the audio. Some sound like words. Some sound like answers to questions you just asked out loud. The pattern is the point. EVP RECORDER Press record. Ask. Stop. Listen back. The recordings hold things you did not hear in the room. INVESTIGATION FIELD KIT Built for the kind of night where the house is quiet and you want to know why. Built for friends sharing the phone around a circle. Built for the curious. For entertainment purposes. Ghost Detector is a paranormal investigation toy that takes itself seriously. The readings are theatre. Take them as seriously as you want to. Open the kit tonight. Terms of Use: https://cmlapps.github.io/Ghost-Detector/terms.html Privacy Policy: https://cmlapps.github.io/Ghost-Detector/privacy.html

About

Harmonograph

Features
Read full description

◆ One-of-a-kind geometric art, drawn by a pendulum Harmonograph recreates a classic 19th-century drawing machine: two swinging pendulums whose overlapping motion traces a glowing line that slowly spirals toward the center of the screen. Every drawing starts with slightly different parameters, so the same pattern never appears twice. What you see being drawn is truly one of a kind. ◆ Discover, collect, and decorate DISCOVER - A new pattern is drawn before your eyes every time you start - Watch the glowing pen tip as each line is born - Tap "Again" to meet the next one-of-a-kind pattern - Pause anytime to enjoy the moment COLLECT - Save your favorites to the gallery with a name of your choice - Patterns are classified into 4 types (petal, star, spiral, loop) with a rarity from 1 to 5 stars - 20 combinations in total: can you discover them all? DECORATE - Export saved patterns as iPhone-sized wallpapers (1290 x 2796) - Choose from 5 background themes: navy, jet black, deep green, wine, and ink purple - Composed to stay clear of the clock and icons on your lock screen ◆ Designed for quiet moments - Works fully offline (network is used only to show ads) - No account required, no personal information collected - Your saved recipes stay on your device only Harmonograph is free, supported by a small banner ad and an occasional full-screen ad when saving wallpapers. Sit back and enjoy the trail of light drawn by the pendulum.

Screenshots

Ghost Detector EMF Scanner4 screens
Harmonograph4 screens

Verdict

The call

The clearest difference is in-app purchases: Harmonograph at none against Ghost Detector EMF Scanner's 10. Ghost Detector EMF Scanner's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement 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. Ghost Detector EMF Scanner sells 8 in-app purchases, starting at $2.99 per 7 days. Harmonograph asks for nothing beyond the download.

UpkeepUpdate frequency

Ghost Detector EMF Scanner ships an update every 3 weeks, Harmonograph every 10 days. The most recent releases landed on November 5, 2026 and October 24, 2026 respectively.

Scorecard2 real differences · 8 level
Ghost Detector EMF Scanner versus Harmonograph: the parameters behind the verdict, then further details
ParameterGhost Detector EMF ScannerHarmonograph
PriceFreeFree
Rating4.6 (14 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings14 — better—
Update frequencyEvery 3 weeksEvery 10 days — better
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone
Requires iOS17.017.0
Further details — not scored
Size39 MB5 MB
Age rating9+4+
DeveloperCloud Motion Lab LLCTakashi Nemoto

In-app purchases

8 purchases

Ghost Detector EMF Scanner

Subscriptions4
  • Weekly Pro$2.997 Days
  • Lifetime Pro - Special Offer7 Days trial$2.997 Days
  • Ghost Detector Pro Weekly$3.997 Days
Show 1 more
  • Yearly Pro$9.991 Year
One-time4
  • Lifetime Pro - Special Offer2 variants$4.99
  • Lifetime Pro - Special Offer$6.99
  • Lifetime Pro - Special Offer$9.99
Show 1 more
  • Lifetime2 variants$19.99
None

Harmonograph

No in-app purchases

Questions

Is Ghost Detector EMF Scanner free?
Ghost Detector EMF Scanner is free to download, with in-app purchases available.
Is Harmonograph free?
Harmonograph is free to download, with no in-app purchases.
Do Ghost Detector EMF Scanner or Harmonograph have ads?
Harmonograph shows ads; Ghost Detector EMF Scanner does not.
Which is updated more often, Ghost Detector EMF Scanner or Harmonograph?
Ghost Detector EMF Scanner ships an update every 3 weeks, and Harmonograph every 10 days. Most recently, Ghost Detector EMF Scanner was updated on November 5, 2026 and Harmonograph on October 24, 2026.

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