# Encrypt37: Encrypt and share — End-to-end encryption

> End-to-end encryption for text and files using PGP, processed on-device. (iPhone/iPad app by Penghui Li.)

- Source: https://appshunter.io/ios/app/encrypt37-encrypt-and-share/id1659301553 (this page in markdown: same URL + `.md`)
- Developer: [Penghui Li](https://appshunter.io/developer/1507760197)
- Category: Utilities, Productivity
- Price: Free
- Rating: 5.00/5 from 2 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.4 · 13 MB
- Languages: English
- Released: 2022-12-19
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/encrypt37-encrypt-and-share/id1659301553/reviews.md

## What is Encrypt37?

End-to-end encrypt text and files, and get raw result.

Open source, no tracking and free forever.

Encrypt37 has no server, everything happens on your device: Your key pair, the encryption process, the encrypted texts and files.

You can safely upload the encrypted texts or files to wherever you want, making any cloud provider an encrypted storage.

Everything is encrypted by the very well established algorithm PGP (https://en.wikipedia.org/wiki/Pretty_Good_Privacy). The algorithm is used by [Proton](https://proton.me/), [Mailvelope](https://mailvelope.com/), [Encrypt.to](https://encrypt.to/) and many others.

Source code: https://github.com/penghuili/Encrypt37

## Key features

- End-to-end encryption
- On-device processing
- PGP algorithm support
- No server involvement
- Open source
- No tracking

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/encrypt37-encrypt-and-share/id1659301553/reviews.md

### 5/5 — Very good app

*2023-11-12*

Very useful👍

## Frequently asked questions about Encrypt37

### What is Encrypt37?

Encrypt37 is an open-source utility app that allows you to end-to-end encrypt text and files directly on your device using the PGP algorithm. It ensures your data remains private and secure without any server involvement.

### How does Encrypt37 ensure privacy?

Encrypt37 prioritizes privacy by performing all encryption processes on your device. It has no servers, no tracking, and the source code is publicly available for review, ensuring transparency.

### What encryption algorithm does Encrypt37 use?

Encrypt37 utilizes the well-established PGP (Pretty Good Privacy) algorithm for its encryption processes. This algorithm is trusted and used by many other security-focused applications and services.

### Can I use Encrypt37 with cloud storage?

Yes, you can safely upload your encrypted texts or files to any cloud storage provider. Encrypt37 makes any cloud service function as encrypted storage for your data.

### Is Encrypt37 free to use?

Yes, Encrypt37 is completely free to use forever. There are no in-app purchases or subscription fees associated with this application.

### Does Encrypt37 have ads?

No, Encrypt37 is ad-free. As an open-source application with no tracking and no servers, it does not display any advertisements.

### What devices does Encrypt37 support?

Encrypt37 is currently supported on iPhone and iPod devices. It is designed for iOS users who need on-device encryption capabilities.

### How often is Encrypt37 updated?

The latest version of Encrypt37 is 1.1.1, which was last updated on August 13, 2023. Updates typically focus on improving functionality and security.

## Version history (last 4 releases)

### 1.1.1 — 2023-08-13

Add Note37 to settings screen.
Happy encrypting :)

### 1.1.0 — 2023-04-16

1. Now you can encrypt file size up to 250MB;
2. Added a new "Key pair generator" screen;

### 1.0.2 — 2022-12-21

Add label to the file action buttons.

### 1.0.1 — 2022-12-19

No release notes.

## Apps similar to Encrypt37

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| --- | --- | --- | --- |
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| [OneCrypt - Encrypt Files](https://appshunter.io/ios/app/onecrypt-encrypt-files/id6459055606) | — | Free | Utilities |
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## More apps by Penghui Li

- [PreCloud: Encrypt file & note](https://appshunter.io/ios/app/precloud-encrypt-file-and-note/id1638793841)

All apps by Penghui Li: https://appshunter.io/developer/1507760197

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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 2026-06-10.*