# Secret letter-SMS encryption Email encryption Text

> Encrypts SMS, emails, and information with private keys and password protection. (iPhone/iPad app by Wenqiang Li.)

- Source: https://appshunter.io/ios/app/secret-letter-sms-encryption-email-encryption-text/id1185398663 (this page in markdown: same URL + `.md`)
- Developer: [Wenqiang Li](https://appshunter.io/developer/1185398662)
- Category: Utilities, Lifestyle
- Price: $0.99
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 7.0 · 2 MB
- Languages: English, French, German, Italian, Japanese, Portuguese, Russian, Chinese, Spanish, Chinese
- Released: 2016-12-14
- Data updated: 2026-06-24
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/secret-letter-sms-encryption-email-encryption-text/id1185398663/reviews.md

## What is Secret letter?

SMS encryption;

Mail encryption;

Information encryption;

Private key is more secure;

Program startup password more secure;

Twelve color skin more personality;

## Key features

- SMS encryption
- Email encryption
- Information encryption
- Private key security
- Program startup password
- Customizable color skins


## Frequently asked questions about Secret letter

### What is Secret letter?

Secret letter is a utility app designed to provide end-to-end encryption for your SMS messages, emails, and other sensitive information. It uses private keys and a program startup password for enhanced security.

### Does Secret letter have ads?

No, Secret letter does not contain advertisements. It is a paid application focused on providing a secure and uninterrupted user experience.

### How secure is Secret letter?

Secret letter utilizes private key encryption and a program startup password to secure your communications. The app emphasizes the security benefits of using private keys for information protection.

### What devices support Secret letter?

Secret letter is available for iPhone and iPod devices. It is designed to run on Apple's mobile operating systems.

### How much does Secret letter cost?

Secret letter is a paid application priced at $0.99. This one-time purchase grants you access to its encryption features.

### Can I customize the appearance of Secret letter?

Yes, Secret letter offers twelve different color skins, allowing you to personalize the app's appearance to match your style and preferences.

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

Secret letter has an age rating of 4+, indicating it is suitable for users of all ages. The app's focus is on communication security.

### When was Secret letter last updated?

The latest version of Secret letter, 1.21, was last updated on December 19, 2016. The app was initially released on December 14, 2016.

## Version history (last 2 releases)

### 1.21 — 2016-12-19

This app has been updated by Apple to display the Apple Watch app icon.

Modify bug

### 1.1 — 2016-12-14

No release notes.

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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 2026-06-24.*