# Deduction Codex — Offline code cracking puzzle

> Offline logic puzzle game to crack secret codes through deduction and reasoning. (iPhone/iPad app by Ceremy Digital Ltd.)

- Source: https://appshunter.io/ios/app/deduction-codex/id6751919824 (this page in markdown: same URL + `.md`)
- Developer: [Ceremy Digital Ltd](https://appshunter.io/developer/1827484812)
- Category: Games, Education, Casual, Puzzle
- Price: Free
- Age rating: 9+
- Requires: iOS 15.1 · 33 MB
- Languages: American English
- Released: 2025-09-15
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/deduction-codex/id6751919824/reviews.md

## What is Deduction Codex?

The Ultimate Logic Puzzle Experience - Completely FREE and OFFLINE!

Challenge your mind with Deduction Codex. Crack secret codes using pure logic, numerical reasoning, and numbers deduction - no guessing, just brilliant reasoning!

Why Players Love It:

• 100% FREE - No hidden costs
• Works Offline - Play anywhere, no WiFi needed
• Unlimited Puzzles - Unlimited number of daily and random puzzles of 4 difficulty levels
• Pure Logic - Challenge your logical brain with clever deduction

How to Play:
Discover a secret 3-digit code by questioning mystical oracles. Each oracle knows one secret rule. Use their cryptic answers to eliminate possibilities until only the truth remains!

Perfect for puzzle game enthusiasts, logic and math lovers, numerical reasoning fans, commuters and travelers, brain training sessions, and offline entertainment.

Enjoy this mind-bending puzzle experience!

Terms of Use: https://deductioncodex.ceremydigital.com/terms-of-use

## Key features

- Logic puzzle gameplay
- Code cracking challenges
- Numerical reasoning
- Unlimited puzzles
- Offline play
- Multiple difficulty levels

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/deduction-codex/id6751919824/reviews.md

### 4/5 — Great, minor bugs

*2026-03-23*

The game overall is great. Mimics the board game, Turing Machine, but in a mobile version. My only complaint is that the notes don’t stay on your notepad through your whole game. They all disappear as soon as you leave the notes pop up.

## Frequently asked questions about Deduction Codex

### How do you play Deduction Codex?

In Deduction Codex, you discover a secret 3-digit code by questioning mystical oracles. Each oracle knows a secret rule, and you use their cryptic answers to eliminate possibilities until only the correct code remains.

### Does Deduction Codex work offline?

Yes, Deduction Codex works completely offline. You can play anywhere without needing a WiFi connection, making it ideal for commuters and travelers.

### Are there ads in Deduction Codex?

No, Deduction Codex is ad-free. The game is 100% free with no advertisements or hidden costs.

### How many puzzles are available in Deduction Codex?

Deduction Codex offers an unlimited number of daily and random puzzles. These puzzles come in four different difficulty levels to challenge players of all skill levels.

### What kind of logic does Deduction Codex use?

Deduction Codex focuses on pure logic and numerical reasoning. The gameplay requires brilliant reasoning and deduction, with no element of guessing involved.

### What devices is Deduction Codex available on?

Deduction Codex is available on iPhone, iPad, and iPod devices.

### What is the age rating for Deduction Codex?

Deduction Codex has an age rating of 9+, making it suitable for younger players and adults alike.

### When was Deduction Codex last updated?

Deduction Codex was last updated on September 15, 2025, with version 1.0.

## Version history (last 1 release)

### 1.0 — 2025-09-15

No release notes.

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## More apps by Ceremy Digital Ltd

- [PhotoSenseAI](https://appshunter.io/ios/app/photosenseai/id6748825782)

All apps by Ceremy Digital Ltd: https://appshunter.io/developer/1827484812

## Related topics

[deduction codex](https://appshunter.io/ios/topics/deduction-codex) · [deduction](https://appshunter.io/ios/topics/deduction)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*