# Logical Argumentation vs DeCiphr

The clearest difference is in-app purchases: DeCiphr at none against Logical Argumentation's 2. DeCiphr also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Logical Argumentation sells 2 in-app purchases, starting at $2.99 per month. DeCiphr asks for nothing beyond the download.

Logical Argumentation ships an update every 3 weeks, DeCiphr every 9 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | Logical Argumentation | DeCiphr |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/logical-argumentation/id6738572175/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Monetization | Free with in-app purchases | — |
| Size | 100 MB | 45 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ARAS MARC-CHRISTOPHE ZIRGULIS](https://appshunter.io/developer/1781191928) | [Salem Alajmi](https://appshunter.io/developer/1895498015) |

## What reviewers say

### Logical Argumentation

[App page](https://appshunter.io/ios/app/logical-argumentation/id6738572175)

Master deductive, inductive, and abductive reasoning with interactive lessons and an AI-powered tutor. Practice argument construction, identify fallacies, and track your progress in this comprehensive logic learning tool.

**Highlights:** Deductive, Inductive, Abductive Reasoning, Logical Fallacies Recognition, Argument Construction & Evaluation, AI-Powered Personal Tutor, Interactive Argument Workshop, Progress Tracking & Analytics, Offline Content Access

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Logic Pro Monthly | $2.99 | per month |
| Logic Pro Yearly | $9.99 | per year |


### DeCiphr

[App page](https://appshunter.io/ios/app/deciphr/id6763804020)

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

**In-app purchases:** none


## Frequently asked questions

### Is Logical Argumentation free?

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

### Is DeCiphr free?

DeCiphr is free to download, with no in-app purchases.

### Do Logical Argumentation or DeCiphr have ads?

Logical Argumentation shows ads; DeCiphr does not.

### Which is updated more often, Logical Argumentation or DeCiphr?

Logical Argumentation ships an update every 3 weeks, and DeCiphr every 9 days. Most recently, Logical Argumentation was updated on October 24, 2026 and DeCiphr on October 24, 2026.

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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.*