Secret Delivery

Secret Delivery encrypts your files and text so only the people you choose can read them. No accounts. No servers. No tracking. Your password never leaves your device — and neither does your data.

FREE TO START
• Encrypt and decrypt text messages — free, forever.
• Share encrypted text as a secretdelivery:// link, or copy and paste the ciphertext anywhere.

PRO UNLOCK (one-time purchase)
• Encrypt and decrypt files of any type.
• Quick Look previews of .sdenc files right inside Files and Finder.
• Import from Camera and Photos, and save to iCloud Drive.
• Face ID / Touch ID lock and configurable autolock.
• Run encrypt and decrypt from Shortcuts, Siri, and Spotlight — or with a long-press in Files.

STRONGER ENCRYPTION
• New files use AES-256-GCM with PBKDF2-HMAC-SHA256 key strengthening (600,000 iterations), a random salt and nonce per file, and an authentication tag that detects tampering.
• Your existing encrypted files still open — Secret Delivery detects the format automatically. Need to send a file to someone on an older version? Turn on Legacy Mode for the session, or upgrade old files in place.

PRIVATE BY DESIGN
• Everything happens on-device. We collect nothing, and there is no analytics SDK.
• The app blurs its contents in the app switcher and wipes temporary decrypted files when it moves to the background.

EXISTING CUSTOMERS
Already bought Secret Delivery? Thank you — everything stays unlocked at no extra cost. Just open the app on your Apple ID and Pro is restored automatically.