DEfO ECH Apps

F-Droid Open Source | System

7 Downloads 17 Views v0.2 11.26 MB 4.1+

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(11.26 MB)

Editor's Overview

DEfO ECH Apps is a system application developed by F-Droid Open Source, packaged as a single Android APK of version 0.2 weighing in at 11.26 MB. The package targets Android 4.1+ and above. Below you'll find the publisher's own description, a quick spec sheet, and a short buyer-beware checklist so you know exactly what you're installing before tapping download.

Install Checklist

Only download through the button on this page — never from third-party mirrors or shortened links, which are the most common way malware spreads.
File size is a light 11.26 MB, so it installs quickly even on modest connections.
This build is signed by "F-Droid Open Source" — always verify the developer name matches what's listed on the app's official store page before installing an update.
After install, Android may prompt you to allow "Install from unknown sources" — approve only this one install, then revoke the permission in Settings > Apps > Special access.
We link directly to the APK file or the publisher's repository; we do not modify the binary. Always run a virus scan after any sideloaded install.

About this app

This is a demo fork of F-Droid to serve as an example app built on the
development fork of Conscrypt which supports TLS Encrypted ClientHello
(ECH). ECH is the next version of the TLS protocol that encrypts
internet traffic and puts the "S" in HTTPS. It makes it possible to
encrypt all of the metadata that is possible to encrypt in the TLS
negogiation. It is a test case for interoperability between various
implementations, platforms, and networks.

The Encrypted ClientHello (ECH) mechanism (IETF draft spec) is a way to
plug a few privacy-holes that remain in the Transport Layer Security
(TLS) protocol that's used as the security layer for the web. OpenSSL
is a widely used library that provides an implementation of the TLS
protocol. The DEfO project is developing an implementation of ECH for
OpenSSL, and various clients and servers that use OpenSSL as a
demonstration and for interoperability testing.

This uses the mirror of f-droid.org that is on Cloudflare with ECH
enabled: https://cloudflare.f-droid.org

DEfO was initially funded by the Open Technology Fund, and
subsequently by the National Democratic Initiative. Tolerant Networks
Ltd. and people from the Guardian Project are doing the work in DEfO.

Details

Version	v0.2
Size	11.26 MB
Developer	F-Droid Open Source
Category	System
Package	ie.defo.ech_apps
Android	4.1+
Last Updated	Oct 29, 2026
Downloads	7

Frequently Asked Questions

Is DEfO ECH Apps free to download?
Yes. The APK file linked from this page is free. The developer may offer in-app purchases once installed, but obtaining the installer itself costs nothing.

What Android version does DEfO ECH Apps require?
Android 4.1+ or newer. Installing on older devices may cause crashes or refuse to install.

Is DEfO ECH Apps safe to install?
We link to the exact APK published by F-Droid Open Source. We do not modify the file. Still, as with any sideloaded app, scan it with a reputable antivirus before opening it, and only grant permissions the app genuinely needs.

How do I update DEfO ECH Apps?
Install the newer version on top of the old one — Android will keep your data. If the signature differs, uninstall first (you may lose local progress).

Why is the app not installing?
Common causes: not enough storage, an older Android version than 4.1+, or a conflicting build already installed. Free up space, check your OS version, and uninstall any previous copy before retrying.

How to Download & Install DEfO ECH Apps

Tap the Download APK button above and save the file to your device.
Open your device Settings → Security (or Apps → Special access → Install unknown apps) and allow your file manager or browser to install unknown apps for this one file only.
Open the downloaded ie.defo.ech_apps.apk file from your Downloads folder.
Tap Install and wait for Android to finish.
Open «DEfO ECH Apps» by F-Droid Open Source and grant only the permissions it actually needs.
Revoke the "unknown sources" permission once you are done installing.

Note: this page hosts or links to the installer only. The application name, icon and description are provided for identification. All trademarks belong to their respective owners.