Calyx VPN

Calyx Institute | Connectivity

8 Downloads 17 Views v1.5 65.51 MB 4.1+

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(65.51 MB)

Editor's Overview

Calyx VPN is a connectivity application developed by Calyx Institute, packaged as a single Android APK of version 1.5 weighing in at 65.51 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 65.51 MB, so it installs quickly even on modest connections.
This build is signed by "Calyx Institute" — 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

With CalyxVPN, you can safely encrypt all your network traffic and route it through the Calyx Institute.

• Anonymous VPN: No user accounts and no logging.
• Anonymous IP Address: When the VPN connection is active, all the servers on the internet will see you as originating from an anonymous IP hosted by Calyx.
• Free: This is a free service provided by the Calyx Institute.
• Open Source: Both the client and server are 100% free and open source software.
• No IPv6 Leaks: CalyxVPN will not leak IPv6 traffic (requires root).
• No DNS Leaks: CalyxVPN is configured on both the client and the server to prevent any leaking of DNS. All DNS requests are anonymously handled by Calyx when the VPN is on.
• Circumvention: When "Use Bridges" option is enabled, all your traffic is hidden as normal web traffic, in order to circumvent some censorship systems that block VPN traffic.

As with all VPNs, CalyxVPN only adds security to your data as it flows over the network. It cannot protect the content of your data that is stored or that you give to a website. It also does not prevent advertising and tracking in your apps or web browser (except when this tracking is based on your IP address).

Details

Version	v1.5
Size	65.51 MB
Developer	Calyx Institute
Category	Connectivity
Package	org.calyxinstitute.vpn
Android	4.1+
Last Updated	Oct 29, 2026
Downloads	8

Frequently Asked Questions

Is Calyx VPN 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 Calyx VPN require?
Android 4.1+ or newer. Installing on older devices may cause crashes or refuse to install.

Is Calyx VPN safe to install?
We link to the exact APK published by Calyx Institute. 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 Calyx VPN?
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 Calyx VPN

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 org.calyxinstitute.vpn.apk file from your Downloads folder.
Tap Install and wait for Android to finish.
Open «Calyx VPN» by Calyx Institute 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.