# Tessercube

> OpenPGP key management and secure messaging tool with a system-wide keyboard. (iPhone/iPad app by SUJITEKU LIMITED LIABILITY CO..)

- Source: https://appshunter.io/ios/app/tessercube/id1455448718 (this page in markdown: same URL + `.md`)
- Developer: [SUJITEKU LIMITED LIABILITY CO.](https://appshunter.io/developer/1049084226)
- Category: Utilities, Productivity
- Price: Free
- Rating: 4.06/5 from 16 App Store ratings · 13 written reviews indexed
- Age rating: 4+
- Requires: iOS 11.0 · 107 MB
- Languages: English, Chinese, Chinese
- Released: 2019-05-25
- Data updated: 2026-07-30
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/tessercube/id1455448718/reviews.md

## What is Tessercube?

[ Basic Functionalities ]
- Generate, import, and export OpenPGP keypairs (EdDSA supported)
- Encrypt and decrypt encrypted messages
- Sign and verify signed messages
- Unified message history log

[ Special Features: Tessercube Keyboard ]
Communicate via OpenPGP in any app, as long as all participants of the conversation have installed Tessercube (or any software supporting OpenPGP implementations).

[ Feedback & Bug Report ]
If you find any problem with Tessercube, you may visit https://github.com/DimensionDev/Tessercube-Talks/issues to open an issue or send an email to info@dimension.im

## Key features

- OpenPGP key generation and management
- Encrypt and decrypt messages
- Sign and verify messages
- Unified message history
- System-wide OpenPGP keyboard

## Recent user reviews (10 of 13)

All indexed reviews: https://appshunter.io/ios/app/tessercube/id1455448718/reviews.md

### 5/5 — Nice app

*2026-04-05, version 1.3.5*

It works and comes with a tutorial

### 5/5 — Update

*2024-12-22, version 1.3.5*

Great app when is version 2 coming out?

### 1/5 — Unable to import armored private key

*2024-01-05, version 1.3.5*

I've created a temporary GPG key pair to encrypt my real private key then import it into Tessercube by email but I was unable to import my armored private key file after interpreting it in the app.

### 5/5 — Does the job well

*2022-05-27, version 1.3.5*

it works great as a mobile means of encrypting and decrypting pgp messages.  simple and reliable

### 4/5 — Would be great if

*2022-05-10, version 1.3.5*

It would be awesome if you guys integrate with Imessage app. Everyone would have loved it.

### 3/5 — Wish…

*2022-04-17, version 1.3.5*

I wish it wouldn’t also send the “sent with Tessercube” comment. I wish I could also send without it pulling up the Tessercube url for receivers.

### 1/5 — Crashes when importing public key, unable to load private key

*2020-12-17, version 1.3.5*

Unstable and not usable. When prompted to paste my private key, an error says it’s unable to parse the public key armor. Crashes when I input both, crashes when I input the public key...

### 2/5 — Does it's job but not open

*2020-07-24, version 1.3.5*

Privacy respecting app is built in trust on the developer and the technology. This app doesn't provide its privacy policy neither provide its source code for inspection for potential insecurities. It is over 95MB which is about 8 times larger than the standards alternatives in the industry for iOS.

### 1/5 — App Crashes

*2020-06-12, version 1.3.4*

Seems like a great app, but it keeps crashing when I try to import a public key. (iPhone 5s iOS 12.4.7)

### 2/5 — App crashes

*2020-03-03, version 1.3.3*

App works great on ipad but crashes on iphone

## Frequently asked questions about Tessercube

### What is Tessercube?

Tessercube is a free utility app that allows users to generate, import, and export OpenPGP keypairs for secure communication. It supports encryption, decryption, signing, and verification of messages.

### How does Tessercube's keyboard feature work?

The Tessercube Keyboard enables you to communicate using OpenPGP directly within any app. This functionality requires all participants in the conversation to have Tessercube or another OpenPGP-compatible software installed.

### What devices is Tessercube available on?

Tessercube is available for iPhone, iPad, and iPod devices, making secure communication accessible on Apple's mobile ecosystem.

### Is Tessercube free to use?

Yes, Tessercube is completely free to use. It does not have any in-app purchases or advertisements, offering a pure, unhindered secure messaging experience.

### How often is Tessercube updated?

The latest version of Tessercube is 1.3.5, which was last updated on June 15, 2020. While updates may not be frequent, the app provides core OpenPGP functionalities.

### What is the age rating for Tessercube?

Tessercube has an age rating of 4+, indicating it is suitable for users of all ages and does not contain mature content.

### Where can I report bugs or provide feedback for Tessercube?

You can report any problems or provide feedback for Tessercube by visiting its GitHub issues page at https://github.com/DimensionDev/Tessercube-Talks/issues or by sending an email to info@dimension.im.

### Does Tessercube support EdDSA keypairs?

Yes, Tessercube supports the generation, import, and export of OpenPGP keypairs, including the EdDSA algorithm, ensuring modern cryptographic standards are met.

## Version history (last 5 releases)

### 1.3.5 — 2020-06-15

- Fix crash when import public key armor under specific situation issue

### 1.3.4 — 2020-03-24

- Fix multiple public keys armor importing fail issue

### 1.3.3 — 2020-02-27

- Allow more lenient message body for decryption
- Importing duplicate keys will update the database correctly
- Fix dismiss card preview missing animation effect issue
- Fix message edition toolbar cannot trigger after switching to another tab issue
- Fix navigation bar black background appeared during transition issue

### 1.3.2 — 2019-10-24

- Fix keyboard UI not follow some text field types issue

### 1.3.1 — 2019-10-17

- Add message bulk delete support

## Apps similar to Tessercube

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Paranoia Text Encryption Lite](https://appshunter.io/ios/app/paranoia-text-encryption-lite/id1092955070) | 4.5 (83) | Free | Utilities |
| [Paranoia Text Encryption PRO](https://appshunter.io/ios/app/paranoia-text-encryption-pro/id935278498) | 4.7 (52) | $3.99 | Utilities |
| [Shared pocket book markdown](https://appshunter.io/ios/app/shared-pocket-book-markdown/id6443658507) | — | Free | Utilities |
| [Paranoia File Encryption PRO](https://appshunter.io/ios/app/paranoia-file-encryption-pro/id6449606072) | 5.0 (5) | $3.99 | Utilities |
| [iPGMail](https://appshunter.io/ios/app/ipgmail/id430780873) | 4.3 (234) | $3.99 | Utilities |
| [Sub Cipher](https://appshunter.io/ios/app/sub-cipher/id1582898316) | 3.8 (4) | Free | Utilities |

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All apps by SUJITEKU LIMITED LIABILITY CO.: https://appshunter.io/developer/1049084226

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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 2026-07-30.*