# SPI vs Chaos Studies

The clearest difference is price: SPI at Free against Chaos Studies's $1.99. SPI also leads on ratings volume (8 vs 2). Chaos Studies's advantage is review sentiment (100% vs 60%) and in-app purchases (none vs 4). On ads, device support and iOS requirement there is nothing between them.

SPI is free to download; Chaos Studies costs $1.99 up front. SPI sells 4 in-app purchases, starting at $4.99 per month. Chaos Studies asks for nothing beyond the download.

Chaos Studies holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 8 and 2 respectively. Written reviews point the same way: 60% of SPI's written reviews are positive against 100% of Chaos Studies's.

## The numbers

| Metric | SPI | Chaos Studies |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [4.8 (8 ratings)](https://appshunter.io/ios/app/spi/id6736894471/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/chaos-studies/id6758313363/reviews)** |
| Number of ratings | **8** | 2 |
| Positive reviews | 59.6% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | — |
| Monetization | **Free** | Paid |
| Size | 70 MB | 41 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 17+ | 4+ |
| Developer | [Spirit Phone Innovations LLC](https://appshunter.io/developer/1767312130) | [Alexander Kohlhofer](https://appshunter.io/developer/1838574122) |

## What reviewers say

### SPI

[App page](https://appshunter.io/ios/app/spi/id6736894471)

This scientific device is designed for paranormal research and ghost hunting. It combines advanced ITC technology with intuitive frequency features to help users connect with the unknown and explore paranormal activity using AI tools.

**Highlights:** Scientific paranormal device, ITC cutting-edge technology, Intuitive frequency features, Connect with the unknown, EVP Evidence, Artificial intelligence tools

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Standard Monthly | $4.99 | per month |
| Ghost Monthly | $7.99 | per month |
| Standard Yearly | $49.99 | per year |
| Ghost Yearly | $79.99 | per year |

**What reviewers like**

- 🤍 Accurate, intelligent, and specific responses
- 🤍 Impressive and surreal communication with spirits
- 🤍 Helpful tool for paranormal investigations and research
- 🤍 Game-changing for the paranormal field
- 🤍 Provides relevant and location-specific information

**What reviewers complain about**

- 🐛 Audio/voice issues (no audio playback, crashes, etc.)
- 🐛 Inconsistent performance (works one day, not the next)
- 🐛 Responses seem AI-generated rather than spirit-driven

**Reported bugs**

- Audio/voice not working
- Crashes and freezes
- Inability to save/review recorded interactions

**Requested features**

- Voice playback for responses
- Improved stability and reliability
- Clearer instructions and guidance for users


### Chaos Studies

[App page](https://appshunter.io/ios/app/chaos-studies/id6758313363)

Explore mesmerizing 3D visualizations of strange attractors, representing complex mathematical systems. Interact with these dynamic point clouds through touch and device tilt, accompanied by immersive spatial audio. Offers a meditative experience with no scores or goals, focusing on mathematical beauty.

**Highlights:** 3D point cloud visualization, Interactive orbit and zoom controls, Device tilt parallax effect, Nine unique strange attractors, Spatial 3D ambient soundtrack, Meditative slow drawing mode

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SPI free?

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

### Is Chaos Studies free?

Chaos Studies costs $1.99, with no in-app purchases.

### Which has better reviews, SPI or Chaos Studies?

Chaos Studies is rated higher. SPI averages 4.8 out of 5 from 8 ratings, while Chaos Studies averages 5.0 from 2 ratings.

### Do SPI or Chaos Studies have ads?

Neither SPI nor Chaos Studies 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.*