Privacy policy

Centium doesn't collect personal data. There are no accounts, ads, analytics or crash reports, and the people who make Centium never receive your traffic or anything about you.

This policy covers the Centium app for Android, in every version (Google Play, F-Droid and the download from this site), and this website. Last updated 12 October 2026.

Your traffic

Centium uses Android's VPN permission for one thing: to send your phone's traffic through the Tor network. It doesn't read, store or change what you send.

• Through three relaysYour traffic is encrypted and passes through three Tor relays run by volunteers. No single relay knows both who you are and where you go.
• What the exit relay seesThe last relay sees which sites you connect to, but not who you are. If a site doesn't use encryption (plain http), that relay can also see what you send to it.
• Name lookupsSite names are looked up at the exit relay, through Tor, not by your internet provider.

Services the app contacts

• The Tor networkTo build your route, Centium downloads the public list of relays and connects to them, like any Tor client.
• check.torproject.org and onionoo.torproject.orgRun by the Tor Project. Contacted through Tor to confirm your connection uses Tor and to show the country websites see you in. They see a Tor exit, not your address.
• GitHub, for updatesOnly the version downloaded from this site checks GitHub for new versions, through Tor once you're connected. The Google Play and F-Droid versions don't; their stores deliver updates.

Your phone's own apps keep sending whatever they normally send. Centium hides your address from them, but it can't stop an app from sharing what you tell it, such as a login.

What stays on your phone

• Your settingsSuch as your exit country or bridge relays. Stored only on your phone.
• The connection logKept in memory while Centium runs, and gone when it closes. It never leaves your phone unless you copy it yourself.
• Tor's relay listA cached copy of the public relay list, so connecting is faster next time.

Uninstalling Centium removes all of this.

This website

• No cookies or analyticsFonts and images are served from this site; there are no third-party trackers.
• Download countPressing Download adds one to a single counter. Nothing about you is stored with it.
• HostingThe site is hosted on Google's Firebase. Like any web host, its servers handle your address to deliver the page. To show the latest version, your browser asks GitHub about Centium's newest release.

Children

Centium isn't directed at children and collects no data from anyone, including children.

Changes and questions

If this policy changes, the new version will appear on this page with a new date. Centium is open source, so you can check what it does in its source code. Questions are welcome on GitHub.