← All apps

CalSync - Local Calendar Sync

Name: CalSync - Local Calendar Sync
Author: Henrique Couto

Henrique Couto

Sync local calendars offline. Free, open source, no account needed.

Calendar
FOSS
Free
No ads
No tracking

Android only

Get CalSync - Local Calendar Sync

Get it on F-Droid Get it on GitHub Get it on Zapstore

What are these stores? F-Droid, GitHub, Zapstore

CalSync is a free and open source alternative to OneCal, CalendarBridge, and Reclaim.ai. It syncs and merges events between local device calendars — no cloud servers, no accounts, no subscription. When an event appears in one calendar, CalSync automatically copies it to another using a name you choose. All syncing happens directly on your device. Your calendar data never leaves your phone.

Developer: Henrique Couto
Source code: github.com/henriquecouto/calendar-sync
Added to AppCosmos: 9 October 2026
License: GPL-3.0-only