TownCipher: Decoder Area

Codes and Cryptography

Free · Designed for iPad. Not verified for macOS.

TownCipher: Decoder Area is a deep library of historical ciphers paired with a hands-on encoder and decoder for every one of them. Caesar, Vigenere, Pigpen, Playfair, Bifid, ADFGVX, Polybius, Beaufort, Bacon's biliteral, Trithemius, Atbash, Autokey, Scytale, Rail Fence, Columnar Transposition, Four-Square, Tap Code, Nihilist, Straddling Checkerboard, Book Cipher, One-Time Pad, Jefferson Disk, Hagelin, a simplified Enigma rotor simulator, and more — each presented with its history, its mechanics, and an interactive workbench where letters change as you type. Beyond the workbench, wander a Cases Library of famous historical cipher events from Mary Queen of Scots' Babington Plot to the Zimmermann Telegram, meet a Pantheon of pioneering cryptanalysts, follow an interactive Timeline of cryptography from the Spartan scytale to the rotor machines of the Second World War, and solve a fresh Daily Decrypt with a streak that follows you across the seasons. Climb the Mastery Belts in every cipher by completing graded Trials. Use the Sandbox to write your own encoded notes for friends. Tap any unfamiliar term to read its Glossary entry without leaving the page.

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Version 1.0.1

The developer, Titas Masalskis, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Identifiers

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Identifiers

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Usage Data

Privacy practices may vary based, for example, on the features you use or your age. Learn More

Accessibility

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Information

Provider
  • Titas Masalskis
Size
  • 20.4 MB
Category
  • Education
Compatibility
Requires iOS 16.4 or later.
  • iPhone
    Requires iOS 16.4 or later.
  • iPad
    Requires iPadOS 16.4 or later.
  • Mac
    Requires macOS 13.3 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
  • English
Age Rating
4+
Copyright
  • © 2026 Titas Masalskis
  • Developer Website
  • Privacy Policy