Spirit Box & Ghost Detector vs Spectra
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Spirit Box & Ghost Detector
This app simulates paranormal investigation tools like a radar camera, spirit box, EMF meter, and EVP recorder. It helps you detect and log potential apparitions and communicate with entities. All findings are saved to a case file for later review.
- Radar camera with apparition detection
- Spirit box with AM radio sweep
- EMF meter using magnetometer
- EVP recorder
- Case file for evidence storage
- Multi-language support
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Something is in the room with you. Find it. Spirit Box & Ghost Detector turns your iPhone or iPad into a paranormal field kit — a camera radar that reveals apparitions around you, a spirit box that answers your questions, an EMF meter driven by the real magnetometer, and an EVP tape recorder. Every catch is saved to your own case file. CAMERA SCAN — RADAR AND APPARITIONS • Hold up your phone and turn slowly; the radar shows how close the entity is • Apparitions manifest in the live camera view — the closer you get, the stronger they appear • The moment one shows itself, an evidence photo is captured automatically GHOST BOX SB-33 — SPIRIT BOX • AM radio sweep, 530–1730 kHz, with real static and a voice pushed through a radio filter • Tap a question key, or switch on Listen and ask out loud • Every session has its own entity — a name, a mood and its own way of answering • The entity answers in your language: English, German, French, Spanish, Italian, Portuguese, Russian, Japanese, Korean or Chinese • Silence is an answer too, and the whole session is saved to a log you can share EMF METER EM-33 • Live readings from the built-in magnetometer in microtesla • Needle dial, K-II style LED ladder, history graph, peak hold and reset EVP RECORDER RX-33 • Ghost tapes that unlock as you catch apparitions • Stereo VU meters and tape deck controls CASE FILE • Every apparition is stored with the time and the EMF reading • Share a photo or a Ghost Box session in a tap FREE AND PREMIUM Ghost Detector is free to play: 20 ghost catches a day, 12 Ghost Box replies a day and the standard entities. Premium removes the limits: • Unlimited ghost scans • Unlimited Ghost Box replies • Every entity, including the rarest ones • Evidence photos without a watermark SUBSCRIPTION • Weekly — $3.99 with a 3-day free trial • Yearly — $24.99 Prices are in US dollars and may vary by region. Payment is charged to your Apple Account at confirmation of purchase. A free trial converts into a paid weekly subscription unless it is cancelled at least 24 hours before it ends. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Manage or cancel any time in Settings → Apple Account → Subscriptions. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://thirtythreeapps.com/ios-ghost-detector-privacy-policy FOR ENTERTAINMENT PURPOSES ONLY Spirit Box & Ghost Detector is a simulation made for fun and for a good scare. Ghosts, spirit box replies and radar contacts are generated by the app. The EMF meter shows real magnetometer values, but the app does not detect real paranormal activity. Rated 13+ for horror themes.
Spectra
This app transforms your phone into a ghost hunting instrument using real hardware sensors. It analyzes EMF, EVP, and motion data, offering explanations for readings and a map of haunted locations. Full access unlocks enhanced playback and advanced features.
- SLS camera with pose detection
- EMF detector with real-time readings
- EVP recorder with live spectrum analysis
- ITC channel for spirit communication
- Motion and pressure sensor tracking
- Map of haunted places
- Session logging and playback
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Spectra turns your phone into a ghost hunting instrument. Every number on screen comes from real hardware in your phone: the magnetometer, the microphone, the barometer, the camera, the accelerometer and gyroscope. It's all processed on the phone and explained in plain English. No random spikes. No theatrics dressed up as data. The measurements are honest. What they mean is your call. SLS OPTICS Point the camera at the room. On-device pose detection draws a glowing stick figure over anything shaped like a person, live, while your other readings stay on screen. It's strict on purpose: it won't outline a coat rack. Tap MARK to keep a frame with the figure burned in. EMF DETECTOR Your phone's compass chip reads the magnetic field around you. Spectra learns the room's normal level, then shows how far each reading climbs above it, in microtesla. Follow the needle toward the source. House wiring sits flat. A passing elevator swells and fades. A sharp climb that follows you around is the one worth writing down. EVP RECORDER A live spectrum shows everything the mic hears, from deep rumble to past the edge of hearing. When something sustained shows up outside the human speech band, below 85 Hz or above 4 kHz, with no voice underneath it, Spectra saves a clip and tags its peak frequency. Detection pauses while you're talking, so a capture can't just be you. ITC CHANNEL Spectra's take on the spirit box. On-device listening writes out what you say and, under your words, surfaces anything talking back. Ask a question, then give it a little quiet. PRESSURE, MOTION AND PRESENCE The barometer tracks air pressure against the room's normal. Doors and drafts jump in steps, weather drifts slowly. Motion sensors tell your footsteps apart from a knock near the phone. A presence level from 0 to 5 weighs every channel: EMF counts least, a voice reply counts most, and readings are discounted while you're walking around. A MAP OF HAUNTED PLACES Find reviewed haunted places across the US, read what people say happened there, and get directions. A person checks each one before it goes on the map. EVERY SESSION, SAVED Each investigation is logged automatically: timestamped contacts, the EMF trace, pressure trends, EVP captures and SLS frames. Go back through any session and play its clips. FIELD MANUAL Every readout has a plain-English page one tap away: what the sensor measures, what the numbers mean, and which boring explanations to rule out first. FREE VS FULL ACCESS Every sensor, EVP detection and capture, session recording, the map, and raw playback of every clip are free, no account needed. Full Access adds the processing: enhanced playback that pitch-shifts ultrasonic and infrasonic clips into hearing range, clip tuning, WAV export, the full SLS OPTICS mode, and custom accent colors. Full Access is available as an annual subscription with a 7-day free trial, a weekly subscription, or a one-time lifetime purchase. Prices are shown in the app in your currency. Payment is charged to your Apple ID when you confirm the purchase, or when the free trial ends. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. You can manage or cancel them in your App Store account settings. PRIVACY Your recordings, transcripts, camera frames and session history stay on your phone, and investigating works fully offline (the map needs a connection). No account, no ads. Spectra does use analytics and crash reporting, and measures which ads bring people in. Nothing from a session is ever part of that. Spectra is for entertainment. The sensor readings, spectrum, audio clips and pose detection are real device measurements. ============ Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is review sentiment: Spectra at 100% against Spirit Box & Ghost Detector's 0%. Spectra also leads on rating (5.0 vs 4.1). Spirit Box & Ghost Detector's advantage is ads (none vs shown). On price, ratings volume, update cadence and in-app purchases 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 & Ghost Detector sells 2 in-app purchases, starting at $3.99 per 7 days and Spectra sells 3 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.
Spectra holds the better App Store score, 5.0 against 4.1. Both are backed by a comparable volume of ratings — 9 and 10 respectively. Written reviews point the same way: 0% of Spirit Box & Ghost Detector's written reviews are positive against 100% of Spectra's.
Spirit Box & Ghost Detector ships an update weekly, Spectra every 4 days. Both last shipped on October 29, 2026.
| Parameter | Spirit Box & Ghost Detector | Spectra |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (9 ratings) | 5.0 (10 ratings) — better |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 9 | 10 — better |
| Update frequency | Weekly | Every 4 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free with in-app purchases |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 84 MB | 34 MB |
| Age rating | 12+ | 12+ |
| Developer | Thirty Three Apps | Byte-Sized Bits, LLC |
Customer experience
Spirit Box & Ghost Detector
Spectra
In-app purchases
Spirit Box & Ghost Detector
- Premium Weekly3 Days trial$3.997 Days
- Premium Yearly$24.991 Year
Spectra
- Pro Weekly$0.997 Days
- Spectra Pro Yearly3 Days trial$12.991 Year
- Pro Lifetime$19.99
Questions
Is Spirit Box & Ghost Detector free?
Is Spectra free?
Which has better reviews, Spirit Box & Ghost Detector or Spectra?
Do Spirit Box & Ghost Detector or Spectra have ads?
Which is updated more often, Spirit Box & Ghost Detector or Spectra?
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