Keeper is an open-source calendar syncing tool that can be used to sync the blocks of time marked as "busy" on your personal, work, business and school calendars.
Canada
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Kalender Sync Alternatives
Kalender Sync is described as 'GDPR-compliant two-way calendar sync across Google, Outlook / Microsoft 365, iCloud, CalDAV and German providers like GMX. You choose per sync what is shared: busy only, title and time, or full details. Connects to Claude and ChatGPT via MCP. German company, German servers, DPA available' and is an app in the ai tools & services category. There are more than 10 alternatives to Kalender Sync for Web-based, SaaS, iPhone and iPad. The best Kalender Sync alternative is Keeper, which is both free and Open Source. Other great apps like Kalender Sync are OneCal, SyncThemCalendars, Neocal and SYNCDATE.
Alternatives list
14 Keeper alternatives
OneCal is a productivity tool that aims to make calendar synchronization as easy as possible. It has a very intuitive UI, supports multi-way syncs, and is fully configurable (you can choose to sync event titles, descriptions, and participants, assign colors to clone events...
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SyncThemCalendars allows you to block time in one calendar based on events in another calendar.
9 SYNCDATE alternativesCalendar sync utility that keeps Google Calendar events aligned across multiple accounts with privacy controls, sync health monitoring, and clean rollback.
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Multical is a calendar syncing app for fractionals, consultants, multi-hyphenates and portfolio careerists who want to stop getting double booked across clients.
Cost / License
- Paid
- Proprietary
Platforms
- Online
- Software as a Service (SaaS)
Calendar Family is a free, web-based calendar-sync service. It mirrors events in real time (webhook/push, not slow polling) across Google and Microsoft/Outlook, one-way or two-way, so you stop double-booking work and personal accounts.
Sync Contacts, Calendar and Tasks automatically Across iPhone, Android, Outlook, Gmail and apps
Cost / License
- Paid
- Proprietary
Platforms
- iPhone
- iPad
- Software as a Service (SaaS)
+7
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