Outline
Outline is a free, open-source privacy app for Android and iOS. A VPN or proxy client. It has 9,270 GitHub stars and is released under the Apache-2.0 license, and you can install it from F-Droid.
github.com/OutlineFoundation/outline-apps (opens in a new tab)
Data as of from the GitHub API and the F-Droid index; description from the project's repository or F-Droid listing. Report an error
About Outline
The Outline Client is a cross-platform VPN or proxy client. The Outline Client is designed for use with the Outline Server software, but it is fully compatible with any Shadowsocks server.
Privacy and F-Droid
F-Droid builds Outline from its published source code and flags anti-features such as ads, tracking or reliance on non-free services.
No anti-features flagged on the latest F-Droid build.
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Is Outline free and open source?
Yes. Outline's source code is public on GitHub under the Apache-2.0 license, which is OSI-approved or FSF-free. F-Droid, which builds it from source, flags no anti-features such as ads or tracking on its latest build.
How do I install Outline?
You can install Outline from F-Droid (package org.outline.android.client); the links are on this page. Its GitHub repository also publishes releases (latest: v1.10.1).
Is Outline still maintained?
The repository's most recent commit was on Oct 24, 2026. Its F-Droid listing was last updated on Jun 10, 2026. appsgit only lists apps whose repository had a commit in the last six months.