Synch keeps your Obsidian vault in step across desktop and mobile with end-to-end encryption, on a sync server you host yourself. Every note is encrypted on your device before upload, so the server stores sealed blobs and cannot read your notes, your file paths, or your vault keys. Edits travel between devices in seconds over a realtime connection, and the encrypted version history brings back earlier drafts and deleted files when a cleanup goes too far. When the same note changes on two devices, a three-way merge combines edits that do not overlap and keeps a conflict copy when they do, so work is never silently overwritten. Markdown, images, audio, video, and PDFs sync by default, and folder exclusions keep big or private corners of the vault at home. Run the server with Docker Compose or as a systemd service, point the plugin at your own API address, and allow only the email addresses you invite. Each vault gets its own database file on your disk, and blob storage can move to any S3-compatible bucket when the vault outgrows local storage. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.