# Logical Fallacy Memory vs Signals and Shadows

The clearest difference is rating: Signals and Shadows at 5.0 against Logical Fallacy Memory's 1.0. Signals and Shadows also leads on in-app purchases (none vs 2) and iOS requirement (15.1 vs 17). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Logical Fallacy Memory sells 2 in-app purchases, starting at $1.99 per month. Signals and Shadows asks for nothing beyond the download.

Signals and Shadows holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

## The numbers

| Metric | Logical Fallacy Memory | Signals and Shadows |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/logical-fallacy-memory/id6484316242/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/signals-and-shadows/id6754225138/reviews)** |
| Number of ratings | 1 | 1 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | — |
| Monetization | Free with in-app purchases | **Free** |
| Size | 7 MB | 43 MB |
| Requires iOS | 17 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [山 汪](https://appshunter.io/developer/1740449088) | [Matthew Kerr](https://appshunter.io/developer/1831569707) |

## What reviewers say

### Logical Fallacy Memory

[App page](https://appshunter.io/ios/app/logical-fallacy-memory/id6484316242)

Master common logical fallacies and enhance your critical thinking skills. This app uses active recall and spaced repetition to help you identify reasoning errors in real-world situations. Track your progress with a personalized mastery map and learn over 60 unique fallacies.

**Highlights:** Active recall testing, Spaced repetition learning, Personalized mastery map, Identify over 60 fallacies, Real-world scenario analysis

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Access (1 Month) | $1.99 | per month |
| All Access (1 Year) | $11.99 | per year |


### Signals and Shadows

[App page](https://appshunter.io/ios/app/signals-and-shadows/id6754225138)

This journal app helps strategists, designers, and curious individuals capture and analyze observations about the changing world. Document emerging trends, identify fading systems, and visualize their impact to build a personal library of future insights.

**Highlights:** Capture signals of emerging trends, Identify fading systems (shadows), Analyze impact and probability, Visualize observations on a horizon matrix, Backcasting to define future states, Synthesize signals into megatrends, Privacy-focused, data stays on device

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

**In-app purchases:** none


## Frequently asked questions

### Is Logical Fallacy Memory free?

Logical Fallacy Memory is free to download, with in-app purchases available.

### Is Signals and Shadows free?

Signals and Shadows is free to download, with no in-app purchases.

### Which has better reviews, Logical Fallacy Memory or Signals and Shadows?

Signals and Shadows is rated higher. Logical Fallacy Memory averages 1.0 out of 5 from 1 ratings, while Signals and Shadows averages 5.0 from 1 ratings.

### Do Logical Fallacy Memory or Signals and Shadows have ads?

Neither Logical Fallacy Memory nor Signals and Shadows 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.*