Ghost Detector EMF Scanner vs Harmonograph
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Real-time EMF radar
- Ghost identification (names, types, danger levels)
- Spooky soundboard with sound effects
- Haptic vibration feedback
- Dark night-vision interface
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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
Harmonograph
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◆ 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
Verdict
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
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.
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.
| Parameter | Ghost Detector EMF Scanner | Harmonograph |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (14 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 14 — better | — |
| Update frequency | Every 3 weeks | Every 10 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 39 MB | 5 MB |
| Age rating | 9+ | 4+ |
| Developer | Cloud Motion Lab LLC | Takashi Nemoto |
In-app purchases
Ghost Detector EMF Scanner
- Weekly Pro$2.997 Days
- Lifetime Pro - Special Offer7 Days trial$2.997 Days
- Ghost Detector Pro Weekly$3.997 Days
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- Yearly Pro$9.991 Year
- Lifetime Pro - Special Offer2 variants$4.99
- Lifetime Pro - Special Offer$6.99
- Lifetime Pro - Special Offer$9.99
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- Lifetime2 variants$19.99
Harmonograph
No in-app purchases
Questions
Is Ghost Detector EMF Scanner free?
Is Harmonograph free?
Do Ghost Detector EMF Scanner or Harmonograph have ads?
Which is updated more often, Ghost Detector EMF Scanner or Harmonograph?
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