# GhostLab vs Harmonograph

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.

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.

## The numbers

| Metric | GhostLab | Harmonograph |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (15 ratings)](https://appshunter.io/ios/app/ghostlab-paranormal-toolkit/id6791637317/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 2 days** | Every 10 days |
| Monetization | Freemium | — |
| Size | 113 MB | 4 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 9+ | 4+ |
| Developer | [Jack Miller](https://appshunter.io/developer/6786409899) | [Takashi Nemoto](https://appshunter.io/developer/6790828928) |

## What reviewers say

### GhostLab

[App page](https://appshunter.io/ios/app/ghostlab-paranormal-toolkit/id6791637317)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| GhostLab Pro | $9.99 | one-time |


### Harmonograph

[App page](https://appshunter.io/ios/app/harmonograph-pendulum-art/id6794857269)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is GhostLab free?

GhostLab is free to download, with in-app purchases available.

### Is Harmonograph free?

Harmonograph is free to download, with no in-app purchases.

### Do GhostLab or Harmonograph have ads?

Harmonograph shows ads; GhostLab does not.

### Which is updated more often, GhostLab or Harmonograph?

GhostLab ships an update every 2 days, and Harmonograph every 10 days. Most recently, GhostLab was updated on October 10, 2026 and Harmonograph on October 2, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*