Signal-iOS

From public sources

Signal-iOS is an open-source private messenger app for iPhone that lets you send encrypted messages and calls to friends.

ApplicationCategory: Mobile Apps · Messaging & email · Security & passwordsOpen sourcedata checked Oct 15, 2026

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Overview

Many everyday messaging apps leave conversations exposed to data collection, so people who want private communication need a trustworthy alternative. Signal-iOS is the iPhone version of the Signal messenger, a free and open-source app for simple, private conversations with friends. It is available on the App Store, with sister apps for Android and desktop. The project is published under the GNU AGPLv3 license and is developed by Signal Messenger, LLC. According to the repository, Signal iOS does not collect any analytics or telemetry. Developers can follow the BUILDING.md guide to configure a development environment and compile the app from source, and contributions are welcome through the contribution guidelines. Signal-iOS suits individuals who want to read and audit the code behind their messaging app, as well as developers who want to build, modify or study a production-grade iOS messenger. Users seeking help can turn to the official Support Center or the community forum.

Installation

Commands are shown, never run by the marketplace. Check them against the official documentation.

Official websiteFrom public sourcesfrom catalog metadata
signal.org/ ↗
Build from sourceFrom public sourcesfrom catalog metadata
Build from source: no validated build recipe — follow the repository instructions.
github.com/signalapp/Signal-iOS ↗

Compatibility

Unknown means no evidence was found — not that the product is incompatible.

Platform	Status	Architecture	Evidence	Confidence
Android	Unknown	—	—	—
iOS	Compatible	—	Declared on the card	—

Releases

checked Oct 29, 2026

No releases found on the source.

Quality profile

algorithm quality-v1.0 · assessed Oct 15, 2026

Quality Score89

Risk Score0

Confidence 1.00

Quality Score and Risk Score are different measures. A high score does not guarantee safety.

Score components

Maintenance · 2020

last activity 1 days ago

Documentation · 1515

README 2762 chars, description present

Ready to use · 156

install instructions: no; releases: yes

Metadata · 108

3/4 of description, homepage, license, topics

Releases · 1010

10 release(s), latest 6 days ago

Category confidence · 1010

classifier confidence 1

Adoption · 1010

12282 stars (log-dampened, 10k = max)

License clarity · 55

SPDX AGPL-3.0

Community · 55

issues enabled, 3527 forks

License

AGPL-3.0

Known licensefrom the repository host

This is the catalog policy status, not legal advice.

Sources

github.com/signalapp/Signal-iOSPrimary★ 12,282 starslast activity Oct 14, 2026Primary repository · Confidence 1.00

Reviews

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README

From signalapp/Signal-iOS · license AGPL-3.0 · fetched Oct 29, 2026

Signal iOS

Signal is a free and open source messaging app for simple private communication with friends.

[Available on the App Store]

Also available on Android and Desktop.

Questions?

For troubleshooting and questions, please visit our support center or unofficial community forum.

Contributing Bug Reports

The best way to submit a bug report or support request is via the Support Center. Signal iOS doesn't collect any analytics or telemetry, and we rely on your feedback to help us troubleshoot and fix problems when something isn't working correctly.

Contributing Code

Instructions for how to configure your development environment and build Signal iOS can be found in BUILDING.md. We also recommend reading the contribution guidelines.

Contributing Ideas

Have something you want to say about Signal Foundation projects or want to be part of the conversation? Get involved in the community forum.

Cryptography Notice

This distribution includes cryptographic software. The country in which you currently reside may have restrictions on the import, possession, use, and/or re-export to another country, of encryption software. BEFORE using any encryption software, please check your country's laws, regulations and policies concerning the import, possession, or use, and re-export of encryption software, to see if this is permitted. See http://www.wassenaar.org/ for more information.

The U.S. Government Department of Commerce, Bureau of Industry and Security (BIS), has classified this software as Export Commodity Control Number (ECCN) 5D002.C.1, which includes information security software using or performing cryptographic functions with asymmetric algorithms. The form and manner of this distribution makes it eligible for export under the License Exception ENC Technology Software Unrestricted (TSU) exception (see the BIS Export Administration Regulations, Section 740.13) for both object code and source code.

License

Licensed under the GNU AGPLv3: https://www.gnu.org/licenses/agpl-3.0.html

Apple and the Apple logo are trademarks of Apple Inc., registered in the U.S. and other countries. App Store is a service mark of Apple Inc., registered in the U.S. and other countries.

Open the repository ↗