GhostLab vs Harmonograph
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GhostLab
This app provides a comprehensive paranormal investigation toolkit for mobile devices. It offers various recording modes for EVP, spirit tracking, and environmental analysis, along with tools for creators to capture and edit evidence.
- Multiple EVP and spirit box recording modes
- ARKit and LiDAR spirit tracking
- Creator Mode with 90-second buffer
- In-app clip editor for sharing
- EMF meters and motion detection tools
- Offline team session sharing
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GhostLab is a complete paranormal investigation toolkit for iPhone and iPad, built for night hunts. ONE HOME, SIX INSTRUMENTS, NO ADS MODES • EMF. DMP-style meter with green-to-red bars, recalibration, and radar view. • EVP. Clean microphone capture. • Spirit Box. Rapid scan-style carrier mixed with your mic. • Spirit Speak. Ask aloud and watch experimental replies condense out of dead-channel static on the analog-footage screen, timestamped like recovered tape. ITC, not a conversation with the dead. • Spirit Music Box. Multi-sensor chime reacting to EMF, motion, and proximity anomalies. • SLS. ARKit stick-figure tracking that records the camera feed: figures and captions burned into the video, your microphone on the soundtrack. Recording survives locks and interruptions. Saving is instant. A12 or later. Pro, with a free trial. CREATOR MODE (PRO) Arm Creator, investigate in any mode, and a rolling 60-second screen plus mic buffer captures the moment. • Edit and Share. Export the last 60s into the in-app clip editor. • Trim, mute/volume, 9:16, 1:1, 16:9 crop, watermark, captions, speed, freeze, color grade, title cards, multi-highlight stitch. • Share to Facebook, Instagram, TikTok, YouTube, and more. • Clips attach to the session Library for later play, edit, and share. TOOLS FOR THE HUNT • Knock detector, Motion-Grid, Word Burst (Pro) • Estes Method workflow and Vigil overnight counters (Pro) • Team sessions. Offline push-to-talk radio and tag sharing (Pro) • Night Vis, torch, red-light UI, dBA level chips (approximate phone meters) • Verify instruments. Optional pre-session control checks LIBRARY AND EVIDENCE Stop and Save keeps audio, video, tags, notes, transcripts, and clips with each session. Review playback, edit clips, export PDF reports (Pro), and keep investigations organized by location, weather, and investigators. GHOSTLAB PRO Core recording stays free. GhostLab Pro is a one-time unlock, no subscription, for Creator Mode, Spirit Speak, SLS, advanced tools, voice packs, custom word lists, PDF reports, Enhance EVP, and more. Most Pro features include one free try. HONEST BY DESIGN GhostLab is for investigation and entertainment. Sensor tools measure the environment (phones, metal, HVAC, and movement all create hits). Dictionary and spirit-box style features are experimental ITC techniques, not scientific proof of spirits. Always review evidence yourself. Requires iOS 17 or later. SLS requires A12 or newer. Some tools need camera, microphone, motion, location, or local network permission. Guides, the full mode tour, and support: ghostlab.icu
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 GhostLab's 1. GhostLab's advantage is ads (none vs shown) and update cadence (every 2 days vs every 10 days). On price, 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. GhostLab sells 1 one-off in-app purchase. Harmonograph asks for nothing beyond the download.
GhostLab ships an update every 2 days, Harmonograph every 10 days. The most recent releases landed on October 10, 2026 and October 2, 2026 respectively.
| Parameter | GhostLab | Harmonograph |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (15 ratings) — better | — |
| Positive reviews | 66.7% of reviews | — |
| Number of ratings | 15 — better | — |
| Update frequency | Every 2 days — better | Every 10 days |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 113 MB | 4 MB |
| Age rating | 9+ | 4+ |
| Developer | Jack Miller | Takashi Nemoto |
In-app purchases
GhostLab
- GhostLab Pro$9.99
Harmonograph
No in-app purchases








