ESP Challenge vs Spirit Box
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ESP Challenge
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Zener ESP Challenge is a professional intuition test designed to measure your sixth sense, clairvoyance, and mental focus using the world-famous Zener cards.
Spirit Box
This app transforms your phone into a paranormal investigation tool, featuring a real-time EMF detector and an advanced spirit box communicator. It's designed for immersive ghost hunting, allowing you to scan electromagnetic activity and attempt spirit communication with a clean, distraction-free interface.
- Real-time EMF detector
- Interactive EMF meter interface
- Advanced spirit box communication
- Dynamic signal feedback
- Focused investigation interface
- Simulates EVP
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Turn your phone into a complete paranormal investigation tool with a powerful combination of a real-time EMF detector and an advanced spirit box communicator. Designed for immersive ghost hunting, this app gives you the tools to scan electromagnetic activity and attempt spirit communication—all in one place. Built with a clean, distraction-free interface, Spirit Box: Ghost EMF keeps your focus where it matters: the investigation. KEY FEATURES 1. Real-Time EMF Detector: - Measure electromagnetic field (EMF) levels using your device’s magnetic sensor - Detect environmental changes and EMF spikes instantly - Track fluctuations as you move through different locations 2. Interactive EMF Meter Interface: - Realistic analog-style EMF gauge - LED signal indicators with dynamic levels - Live digital readings for precise monitoring - Smooth, responsive visual feedback 3. Advanced Spirit Box Communication - Generates real-time audio responses from a large phonetic word bank - Simulates EVP (Electronic Voice Phenomena) for spirit interaction - Wide range of voice types: whispers, tones, echoes, and more - Designed for interactive ghost hunting sessions 4. Dynamic Signal Feedback - Visual changes react instantly to EMF activity - Identify spikes and anomalies in your surroundings 5. Built for Focused Investigations - Minimal, immersive full-screen experience - No unnecessary distractions—just pure functionality - Easy to use for beginners and enthusiasts alike HOW DOES THE EMF DETECTOR WORK? The EMF detector uses your phone’s magnetometer sensor to measure magnetic field strength in your environment. These readings are commonly used in paranormal investigations to identify unusual fluctuations that may indicate environmental changes. As you move your device, the app displays real-time EMF levels through a responsive meter, helping you visualize shifts in energy around you. HOW DOES THE SPIRIT BOX WORK? A spirit box is a popular tool in paranormal research, designed to generate audio from a phonetic word bank. These sounds can be interpreted as responses during ghost hunting sessions. Spirit Box: Ghost EMF simulates this process by rapidly producing words, tones, and fragments of speech, allowing users to listen for patterns or meaningful interactions during investigations. DESIGNED FOR PARANORMAL EXPLORATION Whether you're exploring: - Haunted locations - Abandoned places - Dark rooms or unfamiliar environments This app provides a simple way to scan for energy changes and experiment with spirit communication. No expensive equipment needed—your phone becomes a portable paranormal toolkit. WHY CHOOSE SPIRIT BOX: GHOST EMF? - Combines EMF detection and spirit box features in one app - Real-time readings with responsive visual feedback - Immersive and easy-to-use interface - Perfect for both beginners and experienced ghost hunting enthusiasts IMPORTANT DISCLAIMER Spirit Box: Ghost EMF is intended for entertainment purposes only. It does not provide scientifically proven paranormal detection and relies entirely on your device’s built-in sensors and simulated audio generation. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: ESP Challenge at none against Spirit Box's 3. ESP Challenge also leads on iOS requirement (15.6 vs 17.6). On price, ads 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
Both are free to download. Spirit Box sells 3 in-app purchases, starting at $6.99 per month. ESP Challenge asks for nothing beyond the download.
| Parameter | ESP Challenge | Spirit Box |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.9 (15 ratings) — better |
| Number of ratings | — | 15 — better |
| Update frequency | — | Every 6 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.6 — better | 17.6 |
| Further details — not scored | ||
| Size | 6 MB | 18 MB |
| Age rating | 4+ | 9+ |
| Developer | Alper Ozdil | Hoang Le |
In-app purchases
ESP Challenge
No in-app purchases
Spirit Box
- Month Pass$6.991 Month
- Year Pass$39.991 Year
- Lifetime Access$49.99









