Cipher Command vs Cipher Grid

You are an intelligence agent stationed at a secret facility. Intercepted enemy transmissions are flooding in — and only you can crack them. Black Signal is a historical cryptography puzzle game that puts you inside the world of WWII code-breaking. Decrypt authentic ciphers used in real military operations, uncover classified intelligence, and learn the craft that changed the course of history. CLASSIFIED MISSIONS Work through 30 missions across three clearance levels — CONFIDENTIAL, SECRET, and TOP SECRET. Each opens with a full intelligence briefing, and each solved cipher reveals what actually happened in history. 7 AUTHENTIC CIPHER SYSTEMS Every cipher was used in real military operations — from the ancient Caesar shift to the legendary Enigma machine. Break them all using interactive, historically accurate decryption tools. - Caesar Cipher - Substitution Cipher - Rail Fence Cipher - Vigenere Cipher - Playfair Cipher - ADFGVX Cipher - Enigma-Inspired Cipher FEATURES - Hands-on cipher tools for every encryption type - Guided tutorials that teach real cryptanalysis - Progressive difficulty from CONFIDENTIAL to TOP SECRET - Historical context for every mission and cipher - 15 achievements from Field Agent to Master Cryptanalyst - 4 bonus mission packs: Pacific Theater, D-Day, Eastern Front, Cold War - No ads. No data collection. From Lepercon Studios — Decrypt History.

A new secret message to crack. Every single day. Cipher Grid is a daily puzzle game where you decode real encrypted messages using actual historical ciphers. Each puzzle is a quote hidden behind a different code. Your job is to figure out the letters and reveal it. DAILY PUZZLE One new challenge every day. Each day uses a different cipher and difficulty, so no two days feel the same. 18 CIPHERS TO DECODE Caesar. Atbash. ROT13. Morse. Vigenère. Playfair. Semaphore. Maritime Flags. And more. Each one is a real encryption method used throughout history — from ancient scribes to World War spies to modern radio operators. LEARN AS YOU PLAY Built-in lessons explain every cipher from the ground up. No prior knowledge needed. Start as a complete beginner and work your way to mastering techniques used by real cryptographers. ENCRYPT AND DECRYPT A full toolkit covering 22 ciphers, free for everyone. Includes a working Enigma I simulator with configurable rotors, reflector, ring settings, and plugboard, plus the Hill matrix cipher. ZODIAC CHALLENGE A separate set of hand-picked puzzles to solve at your own pace. Free. PRO Unlock unlimited practice puzzles and Secure Message — public-key encrypted messages and photos that only the intended recipient can decrypt. Keys live on your device. Share the envelope as text or QR code, no servers involved. Every future feature added to the app is included. PRIVACY FIRST No accounts. No analytics. No tracking. No ads. Everything stays on your device. Available in English, French, German, Dutch, and Chinese. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://gist.github.com/ColdCompile/cf9b3ec7bc1f95c6379477e4bd097cf9