CipherKit: Cipher Solver

Cryptography Puzzles & Decoder

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

Now free. New in 1.1: auto-solvers for Vigenère and substitution, animated cipher visualizers, lessons, Sprint and Drill modes, widgets, and an Apple Watch app. Crack any cipher, encrypt anything, and train your brain with daily puzzles. CipherKit is a complete cryptography lab, codebreaking toolkit, puzzle game, and encrypted vault that works fully offline. SOLVE UNKNOWN CIPHERTEXT Paste, type, or scan a message and let CipherKit figure it out: • Auto-detects the likely cipher and recovers the key • Solvers for Vigenère, Beaufort, Gronsfeld, monoalphabetic substitution, affine, rail fence, and columnar transposition • Interactive Substitution Workbench: tap letters to map them, lock what you know, auto-fill by frequency, or let the hill-climbing solver finish • Frequency analysis and index of coincidence in five languages • Recognizes Base64, hex, binary, URL, and decimal encodings • Honest results when text looks like modern encryption • Save sessions with notes and come back later ENCRYPT WITH 48 CIPHERS From antiquity to the present day: • Substitution: Caesar, ROT13, Atbash, Affine, Keyword, Baconian, Homophonic • Polyalphabetic: Vigenère, Beaufort, Autokey, Running Key, Gronsfeld • Transposition: Rail Fence, Columnar, Scytale, Route • Polygraphic: Playfair, Two-Square, Four-Square, Bifid, Trifid, Hill, ADFGX, ADFGVX, Nihilist, Polybius • Machines: Enigma, M-209, Jefferson Disk • Stream: RC4, ChaCha20, Salsa20, One-Time Pad, Vernam, LFSR • Block and AEAD: AES, DES, Blowfish, Twofish, Camellia, AES-GCM, ChaCha20-Poly1305 • Public key: RSA and Diffie-Hellman demonstrations • Morse code and Tap Code, with audio playback WATCH CIPHERS WORK Animated visualizers show every step: rotating Caesar rings, the Vigenère tabula recta, rail fence zig-zags, Playfair grids, columnar read-offs, Enigma rotors stepping, and Morse timelines. Chain several ciphers into a recipe and save it. PLAY EVERY DAY • Daily challenge with streaks, history, and shareable results • 125 hand-verified puzzles across 10 packs, from Easy to Diablo • Sprint, No-Hint Challenge, and endless Cipher Drill modes • Share puzzles with friends by link or QR code • Achievements, mastery levels, and Game Center leaderboards LEARN CRYPTOGRAPHY Interactive lessons with quizzes for every cipher family, a timeline from the scytale to post-quantum encryption, and history, weaknesses, and worked examples for each cipher. KEEP SECRETS SAFE The Vault stores notes with AES-256-GCM encryption, protected by Face ID, Touch ID, or your passcode. Organize with folders and tags, auto-lock on a timer, and export encrypted backups. WORKS EVERYWHERE • Home Screen and Lock Screen widgets with today's challenge and your streak • Control Center control to jump into the daily challenge • Share extension: decode text from Safari, Messages, or any app • Apple Watch app with a Morse tapper that sends to your iPhone • Live camera capture for printed ciphertext • Siri and Shortcuts: encode, decode, analyze, or check your streak • Native Mac app with keyboard shortcuts PRIVATE BY DESIGN No account. No tracking. No servers. Everything stays on your device unless you turn on optional iCloud sync. CIPHERKIT PRO CipherKit is free to download, and the core toolkit stays free. CipherKit Pro is a one-time $9.99 purchase, no subscription, and unlocks expert and Diablo packs, the Machine Room pack, modern crypto ciphers, visualizers, chain recipes, and vault backup. Visualizers and chain recipes include three free tries each. Paid for CipherKit before it went free? Pro is already yours. Great for cryptography students, puzzle lovers, escape room fans, teachers, security enthusiasts, and anyone who likes making their brain earn its keep. Download CipherKit and start cracking.

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CipherKit is now free to download. If you paid for CipherKit before, thank you: CipherKit Pro is already unlocked for you. Nothing to buy, nothing to restore. And if you picked it up during a free week, your Expert and Diablo puzzle packs stay open. CipherKit 1.1 is the biggest update yet. DECODE • Auto-solvers for Vigenère, Beaufort, Gronsfeld, substitution, affine, rail fence, and columnar ciphers • Interactive Substitution Workbench with live frequency bars and hill-climbing solve • Detects Base64, hex, binary, URL, and decimal encodings • Frequency tables for English, German, French, Spanish, and Italian • Saved decode sessions with notes ENCODE • Animated visualizers for Caesar, Vigenère, Rail Fence, Playfair, Columnar, Enigma, and Morse • Chain ciphers into saved recipes • QR codes, share cards, and Morse audio playback PLAY • Sprint, No-Hint Challenge, and Cipher Drill modes • 64 new puzzles plus Polygraphic Playground and Machine Room packs • Share puzzles by link or QR code with a puzzle inbox • Mastery grid, daily challenge history, and Game Center leaderboards LEARN • Interactive lessons and quizzes for every cipher family • A 4,000-year cryptography timeline EVERYWHERE • Home Screen and Lock Screen widgets, a Control Center control • Share extension: decode text from any app • Apple Watch app with a Morse tapper • Live camera text capture • Siri and Shortcuts intents • Spanish, German, and French FIXES • Vault entries now persist correctly across relocks (entries saved in 1.0 must be re-entered) • Corrected ChaCha20, Baconian, Gronsfeld, Trifid, Twofish, and Camellia engines • Achievements and progress survive content updates • Every setting now does something PRO • For everyone new, CipherKit Pro is a single one-time $9.99 purchase. No subscription.

Version 1.1

The developer, Zossoz, 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 Not Collected

    The developer does not collect any data from this app.

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    Information

    Seller
    Zossoz inc
    Size
    24.6 MB
    Category
    Education
    Compatibility
    Requires iOS 18.0 or later.
    • iPhone
      Requires iOS 18.0 or later.
    • iPad
      Requires iPadOS 18.0 or later.
    • Mac
      Requires macOS 15.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 2.0 or later.
    • Apple Watch
      Requires watchOS 11.0 or later.
    Languages
    English and 3 more
    • English, French, German, Spanish
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    © 2026 Zossoz Inc
  • Developer Website
  • Privacy Policy

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