sing-box
sing-box is a free, open-source privacy app for Android. The universal proxy platform. It has 38,653 GitHub stars and is released under the GPL-3.0-or-later license, and you can install it from F-Droid.
- Android
- Privacy, ad-blocking & VPN
- Actively maintained
About sing-box
sing-box is a fast, customizable and univsersal proxy platform that can be used to create network proxy servers, clients and transparent proxies. This app allows users to manage and use local and remote sing-box profiles and provides platform specific feature implementations such as the TUN transparent proxy implementation through the Android VpnService.
Privacy and F-Droid
F-Droid builds sing-box 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.
Screenshots
Screenshots from the app's F-Droid listing.
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What is sing-box?
sing-box is a free, open-source privacy app for Android. The universal proxy platform. It has 38,653 GitHub stars and is released under the GPL-3.0-or-later license, and you can install it from F-Droid.
Is sing-box free and open source?
Yes. sing-box's source code is public on GitHub under the GPL-3.0-or-later 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 sing-box?
You can install sing-box from F-Droid (package io.nekohasekai.sfa); the links are on this page. Its GitHub repository also publishes releases (latest: v1.14.2).
Is sing-box still maintained?
The repository's most recent commit was on Oct 7, 2026. Its F-Droid listing was last updated on Sep 26, 2026. appsgit only lists apps whose repository had a commit in the last six months.