CryptoDuck - Secret Chat

Create your secret language. Custom rules, one-tap encrypt/decrypt, beautiful share cards—processed locally. Pro unlocks unlimited rules & iCloud sync.

CryptoDuck helps you and your friends create a secret language only insiders can read.

Type a message, pick an encryption rule, and get ciphertext in one tap. Share it anywhere - only those who know the rule can decode it. Perfect for couples, close friends, and fun group chats.

[Core Features]

• Encrypt and decrypt text with custom rules
• Build your own cipher: letters, numbers, emoji - mix freely
• Rule management: create, edit, import, export, and share via Deep Link
• Share as plain text, file, or beautiful ciphertext card (Pro: no watermark)
• History: auto-save sessions with one-tap refill (Pro)
• Rule Store: couple packs, emoji ciphers, gaming codes and more

[System Extensions]

• Home Screen Widget: see your active rule, jump straight to encrypt or decrypt
• Shortcuts: encrypt or decrypt without opening the app, results copied to clipboard (Pro)
• iCloud sync: keep rules across your devices (Pro)

[Privacy First]

• Plaintext, ciphertext, and rules stay on your device by default
• No ads, no third-party analytics, no cross-app tracking
• Optional iCloud sync is handled by Apple

[Free vs Pro] Free: 3 manual rules, 12 total, 500 chars per encryption Pro: unlimited rules, no char limit, history, iCloud sync, watermark-free cards, Widget, Shortcuts and all paid rule packs

[Important Notice] CryptoDuck uses custom character mapping - not AES or military-grade cryptography. Do not use for highly sensitive data. Ideal for fun secret messaging between people who share a rule.

Download CryptoDuck and start your secret conversation.

[Auto-Renewable Pro Subscription]

1. Subscription: Continuous (Monthly/Yearly) Pro Membership
2. Duration: One month or one year. Pro features are available during the active subscription period.
3. Price: Monthly and Yearly plans available (actual price shown on the App Store purchase sheet).
4. Payment: Charged to your Apple ID account upon confirmation of purchase.
5. Cancellation: To cancel auto-renewal, turn it off at least 24 hours before the current period ends in Settings > Apple ID > Subscriptions. Otherwise, the subscription renews automatically.
6. Renewal: Your Apple ID account will be charged within 24 hours before the period ends. Upon successful payment, the subscription extends for one more period (1 month or 1 year).
7. Privacy Policy: https://baitemi.com/jmy/privacy.html
8. Subscription Terms: https://baitemi.com/jmy/subscription.html