Easily encode and decode messages using simple substitution ciphers like Caesar and Atbash. Convert up to 2,000 characters at a time and save your cipher settings for later use. Ideal for fun educational purposes, not for serious secret messaging.





207+ iOS apps & games curated and reviewed
Out of 207+ cipher decoder apps on iOS, 19 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.





Easily encode and decode messages using simple substitution ciphers like Caesar and Atbash. Convert up to 2,000 characters at a time and save your cipher settings for later use. Ideal for fun educational purposes, not for serious secret messaging.





This app allows you to send secret messages to your friends using a variety of historical ciphers and codes. It supports popular encryption methods like Caesar Shift, Morse Code, and Vigenere Cipher. The application is open source, inviting community contributions.



This app provides tools for text transformation and cipher decoding. Explore classic encryption methods, convert text to binary, hex, and Base64, and learn about cryptography principles. All processes are performed locally for privacy.


Decode famous quotes using a 1-to-1 substitution cipher. This free word puzzle game challenges your knowledge of language and grammar to reveal insightful sayings from notable individuals. Play online or offline and track your solve times.


This inventive puzzle game challenges your wit with over 100 unique interactive codes and ciphers. Progress by discovering clues, patterns, and utilizing integrated decoding tools. Explore a nonlinear path and uncover secrets with the freedom to save notes and screenshots.






Engage in a captivating puzzle game where you decode classic ciphers and solve cryptogram word puzzles. This app offers a challenging yet accessible experience for those who enjoy riddles and code-breaking. It's designed for curious minds to train their brains with pure, ad-free fun.


Engage your mind with a variety of puzzles including cryptograms, anagrams, crosswords, and Sudoku. This game offers over 500 levels and 10,000 quotes for an enriching intellectual adventure.




Engage your mind with a new word puzzle game. Decipher hidden phrases, learn interesting facts, and enjoy wise thoughts from famous people. This game offers a fun way to train your brain, practice logic, and expand your knowledge.






This app allows users to encrypt and decrypt messages using a variety of classic ciphers. It also includes tools for cryptoanalysis to help understand encrypted text and a mod calculator.




Encrypt and decrypt messages using a wide variety of ciphers, from simple substitution to complex machines. Share your encrypted messages with friends. Supports multiple encryption methods for secure communication.


Encrypt and decrypt messages using classic Caesar and Vigenère ciphers. Easily create secret messages to share with friends or decode incoming encrypted text.


Engage your mind with a variety of cipher decoding challenges. Practice different cipher types, track your progress, and compete with friends. Unlock quotes and sync your achievements across devices.


Securely store, generate, and autofill passwords, passkeys, and 2FA codes across all your devices. Protects sensitive data with zero-knowledge encryption and monitors the dark web for breaches.


This app offers an unlimited supply of number-to-letter word puzzles, also known as Codewords or Cryptograms. Players can customize grid size, difficulty, and starting letters. It supports multiple languages and includes helpful tools for solving.