shizumu is on flathub.
flatpak install flathub app.shizumu.Shizumuthat is the whole install on any linux distribution with flatpak, and updates arrive the same way everything else on the system does.
the part worth more than the convenience: flathub builds shizumu from source on its own infrastructure. we do not upload a binary and ask you to trust it. the manifest points at a public git tag, the build runs there, and the listing reports what it found: agpl-3.0-or-later, auditable code, verified developer.
that matters because of the claim underneath sync. the relay only ever sees ciphertext. you can run your own and check. a claim like that is worth exactly as much as your ability to read the code that makes it, and the store now stands between the source you can read and the binary you install.
one honest note about the listing. flathub marks shizumu as potentially unsafe, and it is right to. the app asks for network access, because it syncs, and flathub flags that categorically for every app that does. it also asks for one runtime directory so the tray icon can be read by your desktop shell, which is a limitation in how the toolkit publishes that icon rather than something we want. neither permission reaches your home directory. we looked at dropping the second one and it would only cost you a working tray icon without changing the label, so it stays, documented in the manifest.
the other channels have not moved. deb, rpm and a tarball for linux, a signed setup exe for windows, and android as a signed apk while the play listing finishes closed testing. all of them are on the download section.
if the flatpak misbehaves, the issue tracker is open. beta means we want the report.