CipherKit vs LeetAICoder

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.

LeetAICoder is prompt-only practice for coding problems. You do not open an editor and hand-write submissions. You explain your intent in natural language, the on-device AI authors every line of the runnable solution, and the app executes and grades it locally against real tests. Inside the app: * First AI Program — Learn the workflow on a simple task: steer the model until tests pass. * Challenges — Same rules on curated LeetCode-style problems: language in, code from the model out. * Leaderboards — Total and per-problem standings; sign in to Game Center for optional global boards. Feedback Questions, bugs, or ideas: aidoge.ys@gmail.com Note: LeetAICoder is not affiliated with LeetCode; problems are LeetCode-style practice.