sing-box
sing-box is a free, open-source privacy app for Android. The universal proxy platform. It has 39,330 GitHub stars and is released under the GPL-3.0-or-later license, and you can install it from F-Droid.
github.com/SagerNet/sing-box (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 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.
Similar apps
More open-source privacy, ad-blocking and VPN apps
Clash Meta For Android
MetaCubeX/ClashMetaForAndroid
A rule-based tunnel for Android.
Active · last commit Oct 21, 2026
Privacy, ad-blocking & VPNAndroidOutline
OutlineFoundation/outline-apps
A VPN or proxy client.
Maintained · last commit Oct 24, 2026
Privacy, ad-blocking & VPNAndroidiOS
Yivi
privacybydesign/irmamobile
Your digital identity in one app.
Active · last commit Oct 16, 2026
Privacy, ad-blocking & VPNAndroidiOS
Mullvad VPN
mullvad/mullvadvpn-app
Protect your online privacy with a fast, trustworthy, and easy-to-use VPN.
Active · last commit Oct 28, 2026
OfficialPrivacy, ad-blocking & VPNAndroidiOS
Sidestep
blankdotdev/sidestep
Intercept URLs, remove tracking, and redirect to privacy-friendly frontends.
Active · last commit Sep 2, 2026
Privacy, ad-blocking & VPNAndroid
Rethink
celzero/rethink-app
Firewall apps, use WireGuard VPN, monitor network, block malware, change DNS.
Active · last commit Oct 24, 2026
Privacy, ad-blocking & VPNAndroid
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: v1.14.4).
Is sing-box still maintained?
The repository's most recent commit was on Oct 28, 2026. Its F-Droid listing was last updated on Oct 12, 2026. appsgit only lists apps whose repository had a commit in the last six months.