Comparison

SPI vs Chaos Studies

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

SPI

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
Read full description

Spirit Phone Innovations (SPI) — Experimental ITC Research Software Spirit Phone Innovations (SPI) is an experimental paranormal research application developed to explore new approaches to Instrumental Trans-Communication (ITC). Conceptualized by paranormal researcher Sean Austin, SPI is designed to analyze environmental audio using artificial intelligence in a way that differs from traditional ITC-style applications. At the core of SPI is SAM Mode, an experimental feature that analyzes environmental audio in real time and applies AI-based processing to identify and interpret audio patterns that may exist outside of normal human speech ranges. Unlike applications that rely on fixed word banks or pre-selected vocabulary, SPI is designed without predetermined phrase limitations, allowing for open-ended analysis rather than scripted responses. KEY FEATURES SAM Mode Audio Analysis: Experimental AI-driven analysis of environmental audio for potential anomalous patterns. No Word Bank Limitation: Designed without a fixed vocabulary list, allowing results to remain unrestricted by preset phrases. Session Logging & Word History: Detected words and session results are automatically saved to an in-app log folder, allowing users to review, compare, and document findings over time. Language Interpretation (Experimental): Optional translation of detected words when foreign-language patterns are identified. Estimated Voice Characteristics: Experimental analysis providing estimated age range and gender characteristics based on detected audio patterns. Community Activity Mapping & GPS Directions: Users can place location pins to document reported activity, view shared locations from other users, and receive GPS directions to reported sites. SPI was designed with the idea that ITC research benefits from documentation, pattern comparison, and shared exploration. The goal is not to provide predetermined answers, but to create an environment where users can explore potential patterns in audio and compare results across locations, environments, and sessions. SPI is intended for exploration and research. Results are not guaranteed and may vary. Spirit Phone Innovations is an evolving platform committed to continuously expanding and refining its tools as AI technology advances. SUBSCRIPTION INFORMATION SPI requires a subscription to access its features. Two auto-renewable subscription tiers are available — Standard and Ghost — each offered as monthly or yearly plans. Standard includes: EVP detection, frequency range control, and paranormal hotspot reporting. Ghost includes: Everything in Standard, plus age and gender detection and multi-language EVP translation. Payment will be charged to your Apple ID account at confirmation of purchase. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions at any time through your App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://spiritphoneinnovations.app/privacy-policy

About

Chaos Studies

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
Read full description

Chaos Studies transforms your device into a window to another dimension — a fully three-dimensional journey into strange attractors. WHAT ARE STRANGE ATTRACTORS? Chaotic systems are deterministic — governed by precise mathematical equations — yet practically unpredictable. The tiniest difference in starting conditions leads to wildly different outcomes. Strange attractors are the shapes these systems trace over time: infinite trajectories that never repeat exactly, yet stay bound within a beautiful, complex form. TRUE 3D EXPLORATION Each attractor is rendered as a living point cloud in three dimensions. Drag to orbit around it. Pinch to dive deeper. Tilt your device and watch the parallax shift — the attractor responds to your movement in space. The depth-of-field effect draws your eye to the focal point while distant particles blur softly. NINE STRANGE ATTRACTORS Each attractor represents a different dynamical system discovered by mathematicians and scientists: Lorenz, Rössler, Aizawa, Burke-Shaw, Halvorsen, Chen, Nose-Hoover, Sprott B, and Dadras. SPATIAL AUDIO THAT SURROUNDS YOU An original ambient soundtrack is positioned in 3D space around the attractor. As you rotate your view, the music shifts — stems pan from left to right, front to back. Use headphones for the full spatial experience. Choose from four presets: Calm, Crisp, Cine, or Driven. DEVICE-RESPONSIVE CONTROLS • Drag to rotate freely in 3D • Pinch to zoom in and out • Tilt for real-time parallax depth • Tap to trigger an explosion and rebirth • Toggle between light and dark modes MEDITATIVE MODE Enable slow drawing speed for an even more contemplative experience. Chaos Studies is designed as a moment of calm — a window into the hidden order within chaos. No scores. No goals. Just mathematical beauty unfolding endlessly in your hands.

Screenshots

SPI4 screens
Chaos Studies4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

Scorecard6 real differences · 4 level
SPI versus Chaos Studies: the parameters behind the verdict, then further details
ParameterSPIChaos Studies
PriceFree — better$1.99
Rating4.8 (8 ratings)5.0 (2 ratings) — better
Positive reviews59.6% of reviews100.0% of reviews — better
Number of ratings8 — better2
Update frequencyEvery 6 weeks—
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree — betterPaid
DevicesiPhone, iPadiPhone, iPad, Mac — better
Requires iOS17.0 — better17.6
Further details — not scored
Size70 MB41 MB
Age rating17+4+
DeveloperSpirit Phone Innovations LLCAlexander Kohlhofer

Customer experience

SPI

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews151 reviews
Positive59.6%
Neutral2.6%
Negative37.7%

Chaos Studies

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

SPI

Reported bugs

3 issues
  • Audio/voice not working
  • Crashes and freezes
  • Inability to save/review recorded interactions

Requested features

3 requests
  • Voice playback for responses
  • Improved stability and reliability
  • Clearer instructions and guidance for users

Chaos Studies

Not enough reviews yet to summarise bugs or requests.

In-app purchases

4 purchases

SPI

Subscriptions4
  • Standard Monthly$4.991 Month
  • Ghost Monthly$7.991 Month
  • Standard Yearly$49.991 Year
Show 1 more
  • Ghost Yearly$79.991 Year
None

Chaos Studies

No in-app purchases

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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