# Ghost Sonar Detector vs HauntKeep

The clearest difference is price: HauntKeep at Free against Ghost Sonar Detector's $0.49. HauntKeep also leads on iOS requirement (15.5 vs 17.0). Ghost Sonar Detector's advantage is in-app purchases (none vs 1). On ads and device support there is nothing between them.

HauntKeep is free to download; Ghost Sonar Detector costs $0.49 up front. HauntKeep sells 1 one-off in-app purchase. Ghost Sonar Detector asks for nothing beyond the download.

## The numbers

| Metric | Ghost Sonar Detector | HauntKeep |
| --- | --- | --- |
| Price | $0.49 | **Free** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hauntkeep-ghost-hunting-kit/id6804314099/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | — |
| Monetization | — | Free |
| Size | 6 MB | 50 MB |
| Requires iOS | 17.0 | **15.5** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 9+ | 12+ |
| Developer | [satoshi amasaki](https://appshunter.io/developer/1891268722) | [Caelori LLC](https://appshunter.io/developer/6804314101) |

## What reviewers say

### Ghost Sonar Detector

[App page](https://appshunter.io/ios/app/ghost-sonar-detector/id6771117031)

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

**In-app purchases:** none


### HauntKeep

[App page](https://appshunter.io/ios/app/hauntkeep-ghost-hunting-kit/id6804314099)

This app transforms your phone into a paranormal investigation kit, featuring tools like an EMF meter, spirit box, and EVP recorder. It provides detailed readings and allows for session recording with environmental context, all designed for atmosphere and a good scare.

**Highlights:** EMF Meter with Kp context, EVP Recorder with waveform and spectrogram, Spirit Box with synthesized voice sweep, SLS camera overlay, Session recording with timeline, Environmental context tagging, Private by design, no trackers

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Toolkit Unlock | $9.99 | one-time |


## Frequently asked questions

### Is Ghost Sonar Detector free?

Ghost Sonar Detector costs $0.49, with no in-app purchases.

### Is HauntKeep free?

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

### Do Ghost Sonar Detector or HauntKeep have ads?

Neither Ghost Sonar Detector nor HauntKeep shows ads.

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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.*