← All apps

Signet

Name: Signet
Author: digital-grease

digital-grease

Verify calls from family, colleagues, sources against deepfake impersonation.

Communication
FOSS
Free
No ads
No tracking

Android only

Get Signet

Get it on F-Droid Get it on GitHub Get it on Zapstore

What are these stores? F-Droid, GitHub, Zapstore

When someone who sounds like your mother calls in a panic asking for bail money, Signet lets you verify it's actually her. Each paired contact generates a rotating 4-word phrase that only the real person's phone can produce. You ask her to read her phrase aloud; you type what you hear. Green banner: verified. Red banner: something's wrong — hang up and call her back on a number you already trust.

Developer: digital-grease
Website: github.com/digital-grease/signet
Source code: github.com/digital-grease/signet
Added to AppCosmos: 10 October 2026
License: AGPL-3.0-only