Archived App (Last seen on 5 Sep 2026)
This is an archived listing of the app previously available on the App Store.
Engage your mind with a logic puzzle game where you crack secret codes using deduction and numerical reasoning. Enjoy unlimited puzzles offline, with no hidden costs or guessing required. Perfect for brain training and on-the-go entertainment.
1.0
September 15, 2025
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.
Yes, Deduction Codex works completely offline. You can play anywhere without needing a WiFi connection, making it ideal for commuters and travelers.
No, Deduction Codex is ad-free. The game is 100% free with no advertisements or hidden costs.
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.
Deduction Codex focuses on pure logic and numerical reasoning. The gameplay requires brilliant reasoning and deduction, with no element of guessing involved.
Deduction Codex is available on iPhone, iPad, and iPod devices.
Deduction Codex has an age rating of 9+, making it suitable for younger players and adults alike.
Deduction Codex was last updated on September 15, 2025, with version 1.0.
