KOSyncthing+ embeds a fully managed Syncthing daemon inside KOReader, with a polished menu, automatic Wi‑Fi handling, conflict resolution, and a plugin API. Works on Kindle, should also work on Kobo, Android and others.

Synchronize your e-reader files across devices using a native Syncthing daemon integrated directly into KOReader.

Self-hosted Windows reading-progress sync: KOReader ↔ Moon+ ↔ Calibre ↔ Goodreads. No cloud, no API key.