Comparison

SpectraScan vs Necrometer II

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

Head to head
About

SpectraScan

Features
Read full description

The ultimate toolkit for paranormal investigators has arrived. SpectraScan is a production-ready, professional-grade ghost hunting application designed for the modern investigator. Leveraging the advanced sensor array of your iPhone, SpectraScan fuses multiple data streams into a single, immersive experience. Whether you’re a seasoned researcher or a weekend hobbyist, our suite provides the data you need to document the unknown. REAL-TIME SENSOR FUSION Don't just look at one meter. SpectraScan monitors EMF (Magnetometer), Motion (Accelerometer/Gyroscope), Atmospheric Pressure (Barometer), and Audio frequencies simultaneously. Our proprietary Activity Score algorithm (0-100) analyzes these inputs to highlight significant paranormal anomalies in real-time. AR HUNT MODE Step into the hunt with an immersive Augmented Reality overlay. Using ARKit 6 (and LiDAR on Pro models), SpectraScan maps your environment and visualizes potential "entities" based on sensor spikes, providing distance tracking and threat-level analysis. EVP STUDIO Capture Electronic Voice Phenomena with our professional audio suite. Featuring real-time waveform visualization and a randomized frequency "Spirit Box" mode, you can record, play back, and manage your evidence log directly within the app. EVIDENCE LOG & HISTORY Keep a detailed timeline of every investigation. Track your sessions with GPS tagging, duration, and peak activity levels. Export your data to analyze patterns and build your case file. KEY FEATURES: EMF Detector: High-frequency magnetometer monitoring with anomaly alerts. Vibration Analysis: Detect the slightest knocks or movements with 100Hz sensitivity. Pressure Monitoring: Track barometric "cold spots" or atmospheric shifts. Immersive Design: Dark, glassmorphic UI with neon accents optimized for night-time use. Privacy First: No internet required. All data and audio recordings stay locally on your device. For entertainment: SpectraScan shows real readings from your iPhone's sensors, but it cannot prove paranormal activity. Have fun and investigate safely. https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Necrometer II

Features
Read full description

Necrometer II is a paranormal investigation companion designed for ghost hunters and researchers. The app combines motion and compass sensors with intelligent random word generation to assist during paranormal investigations. Features include sensor monitoring, spoken word generation, and an easy-to-use interface for use at haunted locations or during field investigations. PG-Necrometer is intended for entertainment purposes only and does not provide scientific or medical measurements.

Screenshots

SpectraScan4 screens
Necrometer II2 screens

Verdict

The call

The clearest difference is price: SpectraScan at Free against Necrometer II's $0.99. Necrometer II's advantage is in-app purchases (none vs 1) and update cadence (every 2 weeks vs every 5 months). On ads there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

SpectraScan is free to download; Necrometer II costs $0.99 up front. SpectraScan sells 1 one-off in-app purchase. Necrometer II asks for nothing beyond the download.

UpkeepUpdate frequency

SpectraScan ships an update every 5 months, Necrometer II every 2 weeks. Both last shipped on October 31, 2026.

Scorecard5 real differences Β· 1 level
SpectraScan versus Necrometer II: the parameters behind the verdict, then further details
ParameterSpectraScanNecrometer II
PriceFree β€” better$0.99
Update frequencyEvery 5 monthsEvery 2 weeks β€” better
AdsNoNo
In-app purchasesYesNo β€” better
DevicesiPhoneiPhone, iPad, iPod β€” better
Requires iOS18.615.0 β€” better
Further details β€” not scored
Size3 MB8 MB
Age rating4+9+
DeveloperGregory Hoganmichael smith

In-app purchases

1 purchases

SpectraScan

One-time1
  • Spectra-Scan Unlocked$4.99
None

Necrometer II

No in-app purchases

Questions

Is SpectraScan free?
SpectraScan is free to download, with in-app purchases available.
Is Necrometer II free?
Necrometer II costs $0.99, with no in-app purchases.
Do SpectraScan or Necrometer II have ads?
Neither SpectraScan nor Necrometer II shows ads.
Which is updated more often, SpectraScan or Necrometer II?
SpectraScan ships an update every 5 months, and Necrometer II every 2 weeks. Most recently, SpectraScan was updated on October 31, 2026 and Necrometer II on October 31, 2026.

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