SpiritData vs Rare PDFs
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SpiritData
This app uses AI to detect and visualize potential paranormal activity through body and face tracking, and speech recognition. It presents raw, unfiltered interpretations from publicly accessible software libraries, aiming for unbiased entity detection and communication.
- Persistent SLS-like body detection
- Face detection
- EVP speech recognition with on-screen text
- Unfiltered AI interpretation
- Open-source web version available
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EVP Speech Recognition + Unique ‘Persistent’ SLS-like body & face detection. Simple. Clear. Unaltered. A universal straightforward unbiased entity detection and communication platform. Nothing random, nothing pre-programmed. Just raw unfiltered AI interpretation. Stick figures and eyes are drawn over people detected on camera. Words heard on the mic appear written below. Unique features: • Unlike other SLS alternatives, figures persist on-screen for several seconds, so quick appearances remain visible. • Faces are detected as well, not just body positions. • Anything you say is printed as text on-screen, including any EVPs that may be heard answering you. Coded entirely by Two Faces Paranormal, a wife and husband ghost hunting duo, based on what we wanted most for our favorite investigation techniques. Absolutely no part of this code is designed to deceive, display false figures, or unheard text. All displayed output is directly from Apple Speech Recognition or other open publicly-accessible software libraries, entirely unaltered. As AI algorithms can hallucinate, we make no claims that unexpected outputs are inherently paranormal. An open-source web version is available for integrity validation on Github. Pareidolia and confirmation bias are removed from the equation, leaving only equitable unbiased machine learning to detect what the human eye does not see or hear, with cold calculated unequivocal scientific unambiguity. 3 methods for detecting and visualizing spirit activity: • SLS-like body-tracking • Face detection • EVP-interpreting speech recognition text on-screen. Two Faces Paranormal makes no claims as to the presence, validity or origin of any sensor reading. Sensor data interpretation is at the sole discretion of the user. Amusement purposes only. Specifications subject to change without notice. The SpiritData app is provided without any expectation, and to be considered experimental. No claim is made to the validity of the data received by these devices. Suggested use cases do not constitute a claim that any result is guaranteed. No claim is made as to Spirit communications, Aliens, Ghosts or any other type of phenomena. The user agrees not to expose children to this device, or any person who may be harmed or damaged by exposure to this device. You must be over 18 and in sound mental condition to use this device. As the owner of this device you are responsible for the device’s use and responsible for the safety of others who may come in contact with this device. This device should not be used by children under the age of 18 or anyone with a history of mental illness. twofacesparanormal.com
Rare PDFs
Explore a curated collection of unique and obscure PDFs from public domain sources, including content from notable figures and organizations. The app features a built-in reader with dark mode and a daily PDF unlock feature.
- Obscure PDF collection
- Public domain documents
- Built-in PDF reader
- Dark mode support
- Daily PDF unlock library
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I've always enjoyed discovering strange PDF's I find in random corners of the internet. This collection from the public domain includes documents from Facebook, Mr Beast, and even the CIA. This reader supports: - The embedded PDFs - Dark mode - A library where you unlock a random new PDF every day I made this app in 24 hours Enjoy! - Isaac Kronz
Screenshots
Verdict
The clearest difference is in-app purchases: Rare PDFs at none against SpiritData's 2. Rare PDFs also leads on ads (none vs shown) and update cadence (weekly vs every 6 weeks). SpiritData's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 18.2). On price, rating and ratings volume 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. SpiritData sells 2 one-off in-app purchases. Rare PDFs asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for SpiritData against 5.0 for Rare PDFs. Both are backed by a comparable volume of ratings — 6 and 3 respectively.
SpiritData ships an update every 6 weeks, Rare PDFs weekly. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.
| Parameter | SpiritData | Rare PDFs |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (6 ratings) | 5.0 (3 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 6 — better | 3 |
| Update frequency | Every 6 weeks | Weekly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 18.2 |
| Further details — not scored | ||
| Size | 128 MB | 114 MB |
| Age rating | 4+ | 4+ |
| Developer | Joseph Wozniak | Isaac Kronz |
Customer experience
SpiritData
Rare PDFs
In-app purchases
SpiritData
- Promo Code Half Off$4.99
- Remove Ads from SpiritData$9.99
Rare PDFs
No in-app purchases
Questions
Is SpiritData free?
Is Rare PDFs free?
Which has better reviews, SpiritData or Rare PDFs?
Do SpiritData or Rare PDFs have ads?
Which is updated more often, SpiritData or Rare PDFs?
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