# SecuMail

> OpenPGP compliant secure messaging and key management for iOS. (iPhone/iPad app by On-Core Software LLC.)

- Source: https://appshunter.io/ios/app/secumail/id414328661 (this page in markdown: same URL + `.md`)
- Developer: [On-Core Software LLC](https://appshunter.io/developer/283621364)
- Category: Business, Utilities
- Price: $19.99
- Rating: 4.70/5 from 3 App Store ratings · 30 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.6 · 20 MB
- Languages: American English, French (France), German (Germany), European Spanish
- Released: 2011-02-03
- Data updated: 2026-09-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/secumail/id414328661/reviews.md

## What is SecuMail?

Are you a personal user who needs to have secure communications between iOS devices and/or desktop computers that are compliant with the OpenPGP standard? SecuMail can do it!

SecuMail is a partial implementation of the OpenPGP standard (RFC2440,RFC4880) that leverages your current cryptography infrastructure and allows your iOS devices to interoperate with it.

SecuMail currently implements a subset of the standard that allows you to encrypt, decrypt, sign and verify OpenPGP messages. It also gives you many options for easily importing and exporting your keys and encrypted messages.


Features:
- Interoperates with PGP versions 8, 9 and 10 and GnuPG 1.x and 2.x
- Public Key 'Encrypt & Sign' and 'Decrypt & Verify'.
- Public Key 'Clearsign' signing and verification.
- Symmetric Encryption and Decryption.
- Supports decoding of MIME encrypted messages, including attachments.
- Supports AirPrint of decrypted messages and attachments on compatible devices.
- Supports opening decrypted messages and attachments on compatible apps.
- TextExpander integration.
- Supports the following symmetric algorithms: AES-256, AES-192, AES-128, Blowfish, Cast5, 3DES, TwoFish.
- Option to remember Key pass phrases (with time-out).
- Server passwords and Key pass phrases are stored in the device key chain, for maximum security.
- Handles gpg, pgp and asc attachments from Mail (for messages and keys)
- Import keys from LDAP, LDAPS, HKP and HTTPS key servers.
- Import keys by Copy/Paste from Safari, Mail or any other program.
- Import keys from pgp, gpg or asc Mail attachments.
- Key Photo ID support.
- Send encrypted text through email or SMS directly from the app.
- Verification of signed messages.
- Ability to sign your messages.

What it does not do:
- Does not have the ability to generate public/private keys.  This must be done with a desktop app.

## Key features

- OpenPGP standard implementation
- Encrypt, decrypt, sign, and verify messages
- Interoperates with PGP and GnuPG
- Supports MIME encrypted messages with attachments
- Key import from servers and attachments
- Secure storage of credentials

## Recent user reviews (10 of 30)

All indexed reviews: https://appshunter.io/ios/app/secumail/id414328661/reviews.md

### 4/5 — Outstanding

*2017-03-23*

Works great for encrypting/decrypting mail, attachments, clipboard contents and text msgs.

Never crashed once in 5 years of use.

Only complaint is you can't generate keys, but have to create elsewhere and import them.

### 4/5 — A well written PGP client

*2016-12-11*

I've been using this client for years now without issue on both my phone and tablet. It works well and is a God send when I'm out and about. 

It would be nice to see it update to support the multitasking in iOS now - as using it side by side with outlook would be useful.

### 5/5 — Excellent

*2016-10-13*

I can now sign ALL my email again. It's been very inconvenient to turn on my computer just to sign my email.

Updating review: This software is still rock solid despite the lack of updates. I haven't tried or trusted any other PGP apps beside this one. 

It could use some updating to add modern integration with share sheets or even an integrated keyboard app in iMessage. But for now I copy and paste what I need. 

Thanks for the app! Don't give it network access.

### 1/5 — I want my money back

*2015-02-08*

This software is not at all as advertised.

### 1/5 — UPDATE NOT WORKING

*2014-11-04*

The app is useless after the latest update, the decryption of any message makes the app crash….

### 1/5 — $50 and no updates since May????

*2014-10-28*

Rip off. Don't buy

### 1/5 — This must be a joke

*2014-07-16*

I give this App 1 star for fooling me into paying 50 dollars.

### 3/5 — 値段ほどにはないです

*2014-07-06*

暴露という本を読み、これからは暗号だ！　とひらめいて「新版暗号技術入門」も読み、そしてPGPの導入をしようとあれこれ試行錯誤中です。Macには幸いなことにGPG Toolsという素晴らしいソフトウエアがあり、よいのですが、iPhoneではどのアプリがよいのか、人柱になるつもりSecuMail 5,000円、oPenGP 400円、iPGMail 200円の３つを買いました。

　過去のレビューには色々書いてありますが、日本語に関してはUTF-8を使えばいずれのアプリも使えています。送信側がWindows DOS, ISO 2022-JP, Shift JISなどだと文字化けして読めません。PGPの暗号化・復号化だけを考えると、いずれのアプリも問題なく動作します。

　SecuMailだけが飛び抜けて値段が高いので、何か飛び抜けて長所があるのかと期待して購入しましたが、期待は外れました。他のアプリと違って対称暗号（AES256等々）の暗号化・復号化に対応しているくらいで、PGPだけを使うのであれば利点はありません。SecuMailの欠点として、秘密鍵をパスフレーズの入力無しに書き出せる点でしょうか。iPhoneの盗難に遭うと、秘密鍵も持って行かれてしまいます。

　iPGMailは、他にない特徴として秘密鍵・公開鍵を作成する機能がついています（他の二つにはついていない）。subkeyにも対応しています。これひとつでPGPと思われている方にはよいかもしれません。iPGMailにも秘密鍵・公開鍵の書き出しの機能がありますが、秘密鍵の書き出しにはパスフレーズを入れないとできないので、一定のセキュリティーは保たれています。

　oPenGPが見た目のインターフェース、操作したときの扱いやすいさ、パスフレーズを保存する・しないなどの設定とか、優れているので、値段を抜きに考えた場合、oPenGPが一番使いたくなる感じです。値段の問題を考えても、oPenGPが一番リーズナブルでしょう。ちなみに鍵の書き出しについては、公開鍵の書き出しには対応していますが、秘密鍵の書き出しはできない仕様なので安心と言えます。

　SecuMailには、値段が10倍するぶんだけ、もっと頑張ってもらいたいところです。メールアプリとしての機能も持ち、暗号・復号を意識させない快適なユーザーインターフェイスだとよいのですが。丁度、GPG ToolsをインストールしたMac OS Xのメールのように。あるいは、ECCという最新の非対称暗号を導入して、ユーザーインターフェイスにすぐれたThreemaというアプリのように。

### 5/5 — Outstanding

*2013-10-29*

If you have an iPhone and value security on the road, this is the way to do it. I tried one other app first and it was both buggy and limited. SecuMail is easy to use and integrates well with mail. Support answers questions quickly and competently.

I tested SecuMail by sending messages to a PC with GPG. I was able to en- and decrypt everything thanks to OpenPGP standards. However, I found SecuMail easier to use than the command line on the PC, both for messages and keys.

Great job and worth the money!

### 1/5 — Stürzt leider nur noch ab

*2013-10-15*

Seit dem letzten Update (noch) weniger zu gebrauchen. Unter IOS7 ist schon beim Start Schluss...

## Frequently asked questions about SecuMail

### What is SecuMail?

SecuMail is an iOS application that implements a subset of the OpenPGP standard, allowing users to encrypt, decrypt, sign, and verify messages securely. It is designed to interoperate with existing PGP cryptography infrastructure.

### Does SecuMail generate public/private keys?

No, SecuMail does not have the ability to generate public/private keys. This functionality must be performed using a desktop application.

### What PGP versions does SecuMail support?

SecuMail interoperates with PGP versions 8, 9, and 10, as well as GnuPG versions 1.x and 2.x. It supports various symmetric algorithms like AES-256 and Blowfish.

### How does SecuMail handle keys?

SecuMail allows for easy importing and exporting of keys. Keys can be imported from LDAP, LDAPS, HKP, and HTTPS key servers, as well as via copy/paste and Mail attachments.

### Is SecuMail available on other platforms?

Based on the provided information, SecuMail is an application for iOS devices. It is designed to allow iOS devices to interoperate with desktop computers.

### How much does SecuMail cost?

SecuMail is a paid application priced at $19.99. It does not appear to have in-app purchases or a subscription model.

### How often is SecuMail updated?

The latest version of SecuMail is 3.0, which was last updated on April 10, 2026. This indicates a development cycle that may vary.

### What is the age rating for SecuMail?

SecuMail has an age rating of 4+. This suggests it is suitable for a wide range of users, including younger individuals with adult supervision.

## Version history (last 5 releases)

### 3.0 — 2026-04-10

Updated for iOS 15+
Updated Dropbox API

### 2.6.3 — 2015-03-06

This update from Apple will improve the functionality of this app. No new features are included.

Added French localization.

### 2.6.1 — 2014-11-07

Fix for iOS 7.1.2 crashing issue.
Fixed BZip2 compression.

### 2.6 — 2014-11-01

- Added Retina HD support
- Added TouchID support to application lock
- Added 64-bit support
- iOS 7.1+ now required
- iOS 8 bug-fixes
- Fixed dash encoding bug
- Cosmetic fixes to the Settings screen
- Updated Dropbox integration

### 2.5.5 — 2014-05-09

- Improved handling of IANA characters sets.
- Properly decode MIME email that only contains attachments.

## More apps by On-Core Software LLC

- [On-Core Wordfind](https://appshunter.io/ios/app/on-core-wordfind/id285884423)
- [PictureFlip](https://appshunter.io/ios/app/pictureflip/id285884811)
- [SalesCalc](https://appshunter.io/ios/app/salescalc/id286366281)
- [On-Core Sudoku](https://appshunter.io/ios/app/on-core-sudoku/id287314682)
- [Wordfind Kids](https://appshunter.io/ios/app/wordfind-kids/id289277601)
- [Pachinko](https://appshunter.io/ios/app/pachinko/id303527165)

All apps by On-Core Software LLC: https://appshunter.io/developer/283621364

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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 2026-09-10.*