Comparison

SP Music Box vs Ghost Detector EMF Necrometer

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

Head to head
About

SP Music Box

This app uses your phone's sensors to detect paranormal activity by alerting you to EMF fluctuations, motion, and magnetic heading changes. It plays sounds and lights up the screen when sensors are triggered, logging events for later review.

Highlights
  • EMF fluctuation detection
  • Motion and rotation sensing
  • Magnetic heading changes
  • Customizable alert sounds
  • Sensor activation logging
  • Real-time sensor status display
Read full description

Dive into the mysteries of the paranormal with the SP Music Box app, designed specifically for paranormal investigations. Whether you're a seasoned ghost hunter or a curious novice, SP Music Box transforms your smartphone into a powerful tool for detecting the unseen. Through the use of nothing but your iPhone's built-in sensors, the app will detect and alert you to EMF fluctuations, motion and rotation of your device, and changes to the magnetic heading, so alerting you to the possible presence of a spirit. Whenever one of the sensors is activated, a sound will play (select from 5 different built-in sounds / tunes), and the screen will light up, showing which of the sensors has been triggered. Triggering a sensor will also create a log, so you can see later the exact time specific a specific sensor was activated. Download the SP Music Box app today and let it help you discover the unknown. Explore the mysteries that lie beyond our world and uncover the secrets of the paranormal with the ultimate investigator's music box app.

About

Ghost Detector EMF Necrometer

This app combines EMF detection with a spirit box to facilitate paranormal communication. It offers professional-grade tools for real-time environmental monitoring and authentic voice manifestations, designed for both enthusiasts and experienced investigators.

Highlights
  • EMF Magnetic Energy Detection
  • DR60 Spirit Box Sound Bank
  • Phoneme-Based Audio Generation
  • 9 Sound Banks and White Noise
  • Spoken Response System (Text-to-Speech)
  • Built-In Audio Effects (Echo, Reverb)
  • Advanced Paranormal Tools (Waveform Display)
Features
Read full description

Step into a new era of paranormal communication with Ghost Detector EMF Necrometer, a powerful fusion of EMF detection and spirit box technology. Designed for both enthusiasts and experienced investigators, Necrometer delivers professional-grade EVP, EMF, and ITC tools for authentic and immersive spirit communication. EMF Magnetic Energy Detection • Uses your device’s built-in magnetometer sensor to measure fluctuations in the electromagnetic field (EMF) • Displays real-time readings and energy spikes for accurate environmental monitoring • Ideal for investigations in historical locations such as the Queen Mary, Waverly Hills Sanatorium, or Eastern State Penitentiary • Perfect for both professional researchers and hobby investigators DR60 Spirit Box Sound Bank • Inspired by the legendary Panasonic DR60 EVP recorder, used by investigators worldwide • Generates authentic white noise and randomized phoneme fragments for genuine spirit communication • Delivers clear, realistic voice manifestations similar to those captured during field sessions at Gettysburg, the Myrtles Plantation, and the Stanley Hotel Phoneme-Based Audio • Uses reversed, fragmented, and multilingual phonemes for accurate ITC interaction • Each vocal element is created from minimal raw sounds such as “na,” “no,” “di,” “ma,” and “may” • Ensures that no responses are pre-recorded every sound is generated in real time during sessions 9 Sound Banks and White Noise • 9 professional sound banks provide variety and depth for EVP experiments • Includes a White Noise Bank modeled after the DR60’s unique EVP tone • Layer multiple banks to enhance clarity and resonance in different environments, from old asylums to open field investigations Spoken Response System (Text-to-Speech Integration) • Detected or generated words are spoken aloud in real time using built-in text-to-speech technology • Each response is voiced automatically, creating clear and audible spirit communication • Customize playback voices such as Necro, human, or robotic tones for different session atmospheres • Delivers an immersive, lifelike experience that combines visual words with audible speech Built-In Audio Effects • Echo – repeats sounds in real time to highlight responses • Reverb – creates an atmospheric and spacious tone for better clarity • Adjustable levels to suit both quiet indoor and high-energy outdoor investigations Advanced Paranormal Tools • EMF tracking overlay for visual energy monitoring • Real-time waveform display for live EVP observation • Mute switch detection ensures uninterrupted audio capture • Reliable for both on-site fieldwork and controlled research environments Subscriptions • Weekly Plan – unlocks all premium features for seven days of unlimited investigation • Monthly Plan – unlocks all premium features for thirty days of unlimited investigation • Lifetime Plan – one-time purchase for complete, lifetime access to all features All purchases are securely processed through the Apple App Store. Cancel anytime. Subscriptions are managed and billed through Apple’s App Store and renew automatically unless cancelled in your Apple ID settings. Legal https://canonicalized.com/includes/terms-and-conditions.html https://canonicalized.com/includes/privacy-policy.html

Screenshots

SP Music Box3 screens
Ghost Detector EMF Necrometer4 screens

Verdict

The call

The clearest difference is review sentiment: SP Music Box at 100% against Ghost Detector EMF Necrometer's 54%. SP Music Box also leads on rating (5.0 vs 4.0) and in-app purchases (none vs 4). Ghost Detector EMF Necrometer's advantage is price (Free vs $2.99) and update cadence (every 10 days vs every 5 months). On ads, 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

Ghost Detector EMF Necrometer is free to download; SP Music Box costs $2.99 up front. Ghost Detector EMF Necrometer sells 4 in-app purchases, starting at $4.99 per 7 days. SP Music Box asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

SP Music Box holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Ghost Detector EMF Necrometer has 434 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of SP Music Box's written reviews are positive against 54% of Ghost Detector EMF Necrometer's.

UpkeepUpdate frequency

SP Music Box ships an update every 5 months, Ghost Detector EMF Necrometer every 10 days. The most recent releases landed on October 8, 2026 and October 20, 2026 respectively.

Scorecard8 real differences · 3 level
SP Music Box versus Ghost Detector EMF Necrometer: the parameters behind the verdict, then further details
ParameterSP Music BoxGhost Detector EMF Necrometer
Price$2.99Free — better
Rating5.0 (1 ratings) — better4.0 (434 ratings)
Positive reviews100.0% of reviews — better54.3% of reviews
Number of ratings1434 — better
Update frequencyEvery 5 monthsEvery 10 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid — betterSubscription
Best chart rank#199 — better—
DevicesiPhoneiPhone, iPad — better
Requires iOS17.017.0
Further details — not scored
Size9 MB68 MB
Age rating9+9+
DeveloperHaunted Scotland Investigates LTDBoss Web SRL

Customer experience

SP Music Box

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Ghost Detector EMF Necrometer

All ratings389 ratings
Positive74.3%
Neutral4.9%
Negative20.8%
Written reviews35 reviews
Positive54.3%
Neutral2.9%
Negative42.9%

In-app purchases

None

SP Music Box

No in-app purchases

4 purchases

Ghost Detector EMF Necrometer

Subscriptions2
  • Weekly Plan$4.997 Days
  • Monthly Plan$9.991 Month
One-time2
  • Special Offer$14.99
  • Lifetime Plan$29.99

Questions

Is SP Music Box free?
SP Music Box costs $2.99, with no in-app purchases.
Is Ghost Detector EMF Necrometer free?
Ghost Detector EMF Necrometer is free to download, with in-app purchases available.
Which has better reviews, SP Music Box or Ghost Detector EMF Necrometer?
SP Music Box is rated higher. SP Music Box averages 5.0 out of 5 from 1 ratings, while Ghost Detector EMF Necrometer averages 4.0 from 434 ratings.
Do SP Music Box or Ghost Detector EMF Necrometer have ads?
Neither SP Music Box nor Ghost Detector EMF Necrometer shows ads.
Which is updated more often, SP Music Box or Ghost Detector EMF Necrometer?
SP Music Box ships an update every 5 months, and Ghost Detector EMF Necrometer every 10 days. Most recently, SP Music Box was updated on October 8, 2026 and Ghost Detector EMF Necrometer on October 20, 2026.

Other comparisons