# Secret Delivery — Private Text and File Sharing

> Encrypted messaging and file sharing app with password protection. (iPhone/iPad app by Tractus, Inc.)

- Source: https://appshunter.io/ios/app/secret-delivery/id459678901 (this page in markdown: same URL + `.md`)
- Developer: [Tractus, Inc](https://appshunter.io/developer/870804567)
- Category: Utilities, Social Networking
- Price: $0.99 with in-app purchases
- Rating: 3.67/5 from 3 App Store ratings · 7 written reviews indexed
- Age rating: 4+
- Requires: iOS 18.0 · 3 MB
- Languages: English, Russian
- Released: 2011-09-02
- Data updated: 2026-07-04
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/secret-delivery/id459678901/reviews.md

## What is 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.

## Key features

- Encrypted text and file sharing
- Password protection for messages and files
- AES encryption standard
- Encrypt/decrypt files outside the app
- Intuitive user interface
- Unlimited messages and file attachments

## Pricing and in-app purchases

Base price: $0.99.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Secret Delivery Pro | $0.99 | one-time |


## Recent user reviews (7 of 7)

All indexed reviews: https://appshunter.io/ios/app/secret-delivery/id459678901/reviews.md

### 1/5 — NEW VERSION: USELESS-CRASHES on iPAD, iOS 9.0.2

*2015-10-08*

NEW VERSION: USELESS-CRASHES on iPAD

### 5/5 — Why didn't I use it before?

*2015-03-19*

That's a very cool idea for protecting messages and files. I personally don't want any of my messages or pictures that I send to be seen by other people. It's even better than a snapchat because without a password it's impossible to open the message/file. Love it!

### 5/5 — Great, exactly what I needed

*2015-03-07*

This app is fantastic, it's exactly what I needed to send documents to my coworkers without fear of them being read by unwanted eyes.

The new iOS 8 Extension for previewing pictures and documents that are sent to you is amazing as well, it make it so much quicker to not have to leave the messages app to view an encrypted picture someone texted you.

### 1/5 — Hassle

*2012-06-24*

You can't export the photos without emailing them. You can't send photos over text, only through email. The two main things that were important to me

### 5/5 — Amazing

*2011-10-18*

Absolutely fantastic app. Flawless in design and inspired workmanship. I will recommend this to all

### 5/5 — Great app

*2011-09-06*

Works like a charms. Really cool.

### 5/5 — Great app!

*2011-09-04*

Really cool if only more people had it we could use it more

## Frequently asked questions about Secret Delivery

### What is Secret Delivery?

Secret Delivery is a utility app designed for secure text and file sharing. It uses AES encryption to protect your messages, photos, and documents with password locks, ensuring only intended recipients can access them.

### How does Secret Delivery work?

You compose a message or select a file, encrypt it with a password, and then send it. The recipient must have Secret Delivery installed and know the password to decrypt and view the content.

### Can I encrypt files from other apps with Secret Delivery?

Yes, you can now encrypt files directly from your email attachments, photo gallery, and other applications outside of the Secret Delivery app itself.

### Does Secret Delivery have ads?

No, Secret Delivery does not contain advertisements. It is a paid application with no additional fees for unlimited messages and file attachments.

### What devices does Secret Delivery support?

Secret Delivery is available for Mac, iPhone, iPad, and iPod devices.

### What is the age rating for Secret Delivery?

Secret Delivery has an age rating of 4+, making it suitable for a wide range of users.

### How often is Secret Delivery updated?

The app was last updated on September 12, 2024, with version 3.1.4, indicating regular maintenance and feature additions.

### What is the price of Secret Delivery?

Secret Delivery is a paid application, available for a one-time purchase of $0.99.

## Version history (last 5 releases)

### 4.0.2 — 2026-06-15

Secret Delivery 4.0 is a complete, ground-up rewrite.

A NEW APP
• Native SwiftUI design for iPhone, iPad, and Mac — light/dark mode, Dynamic Type, and a real Mac sidebar, toolbar, and keyboard shortcuts (⌘N, ⌘O, ⇧⌘L).

FREE, WITH PRO UNLOCK
• Text encryption and decryption are now free for everyone.
• Pro Unlock (one-time) adds file encryption, Quick Look previews, Camera/Photos import, iCloud Drive, Face ID / Touch ID, and autolock.
• Already a paying customer? Everything stays unlocked automatically — thank you.

STRONGER ENCRYPTION
• New files use AES-256-GCM with PBKDF2 key strengthening (600,000 iterations) and built-in tamper detection.
• All your existing .sdenc files and secretdelivery:// links keep working — the format is detected automatically, with an optional Legacy Mode for replying to people on older versions.

PRIVACY & SECURITY
• App-switcher blur, automatic wipe of temporary decrypted files, and on-device-only processing.

### 3.1.4 — 2024-09-12

• Stability and Performance Improvements

### 3.1.3 — 2023-09-07

• Fixed issue where opening encrypted file from other apps could be challenging

### 3.1.2 — 2021-09-24

Few minor bug fixes

### 3.1.1 — 2021-01-06

• Removed some unnecessary debugging code

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-04.*