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PresenceOS
Theme

Install the beta.
Break it for me.

This is the very early beta of Guardian Companion — the parent-side app of the Guardian Relay system. I'm publishing it for one reason: so people can run it and tell me what breaks. It's rough in places, it will show, and every bug report lands in my personal inbox, not a ticket queue. What you hit this month decides what I fix next month.

Guardian Companion
v1.3.50 (beta)· Android APK· 104 MB· built 9 July 2026
⬇ Download the APK
SHA-256 — check it if you're the checking kind (I would be): 5513ae7842eefc68edbed62e605b0d4b25870435a7b263e9b749c1828f745416

The file itself is served from presenceos.services — my own relay server, the same one the apps talk to. Same hardware, same owner, same signature.

This page — on presenceos.mobile — is the only legitimate place to get this download. Nowhere else. Not a mirror, not an APK aggregator site, not a link someone forwarded you. Sideloaded apps are exactly how phones get compromised, which is why I sign every build myself and publish the checksum above. If the hash doesn't match, delete the file and email me.

How updates keep
everyone honest.

Signed by me, shipped by me

Once installed, the beta keeps itself current: it checks my server, downloads the new build, and walks you through installing it. There is no app store in the loop for the beta — I build it, I sign it, I push it. (The polished version for iOS and Android will be sold through the Apple and Google stores, following their guidelines, at $5/month.)

The minimum-version floor

My server enforces a minimum version. When I raise the floor — say, after a security fix or a protocol change — builds below it must update before they can reconnect. No nagging banner you can dismiss for three years. This is how end-to-end encryption stays locked in: the fleet moves together, old protocol versions die quickly, and encrypted chat through Presence remains the only way to chat on PresenceOS.

What it talks to

Inside the apps, devices connect to presenceos.services — my pairing tracker and relay. Its job is memory and plumbing: it remembers which devices are linked to which, so your phones don't forget each other, and it passes encrypted packets between them. It cannot read what it carries.

Fair warning, honestly given: this is beta software from a one-person project. Keep expectations calibrated, keep backups of anything precious, and when something falls over — tell me. That's the deal.