Tymeslot syncs two-way with the calendars you already use. New bookings appear instantly; busy time you block elsewhere disappears from your availability automatically.
If your real availability lives across a work calendar, a personal calendar, and whatever your booking tool thinks is free, double-bookings are only a matter of time. The usual fix, manually blocking time in two places, is exactly the busywork a scheduling tool is supposed to remove.
Tymeslot keeps your genuine free/busy in sync with every connected calendar, and writes each new booking straight back. Block a dentist appointment in your personal calendar and that slot vanishes from your booking page; accept a meeting and it lands in the right calendar with the video link attached. Tymeslot also speaks plain CalDAV, so Apple iCloud, Nextcloud, Radicale, Baïkal, Zimbra and mailbox.org get the same treatment as Google, and an on-premises Microsoft Exchange server connects too.
Link Google Calendar or Outlook with OAuth, or point Tymeslot at a CalDAV or Exchange server with a URL and credentials. Read-only calendar feeds work too.
Select which connected calendars block your availability and which one new bookings are written to. Keep personal and work cleanly separated.
Tymeslot syncs your busy times in the background, with push updates from Google and Outlook and regular checks for other servers. Guests only see slots that are actually free.
Confirmed bookings are written to your calendar instantly; external changes flow back and update your availability automatically.
Two-way sync over the Google Calendar API. Add Google Meet and every booking gets its own video room.
Two-way sync over the Microsoft Graph API. On-premises Exchange servers connect too, and Microsoft Teams can add a meeting link to every booking.
Ready-made presets for Apple iCloud, Nextcloud, Radicale, Baïkal, Zimbra and mailbox.org, plus generic CalDAV for everything else.
Combine several calendars, and read-only calendar feeds, into one picture of when you are free.
Slots that clash with existing events are hidden before a guest can pick them.
OAuth tokens and CalDAV passwords are AES-encrypted at rest, never stored in plaintext.
Most scheduling tools cover the big hosted calendars and treat everything else as an afterthought. Tymeslot gives open calendar standards equal standing and keeps your data where it belongs.
Self-hosted Nextcloud or Radicale users get the same two-way sync as Google users, out of the box.
Your event details stay in your own dashboard. People booking you see only which slots are open, never what you are busy with.
Self-host and you connect Google and Microsoft with your own app credentials, so your calendar data never passes through us.
The page where someone picks a slot carries no advertising pixels or third-party analytics.
Built the same way as the rest of Tymeslot: open-source, private, self-hostable.
Drop a Tymeslot booking widget onto any page with one script tag: inline, popup or floating button, styled to match your brand. The widget sizes itself, so there is no iframe height to fiddle with.
Connect your own Stripe account and put a price on any meeting type. Clients pay as they book, and the slot is confirmed only once the payment clears.
Tymeslot is open source. Run the whole platform on your own server with Docker, Cloudron or Railway, and every booking, calendar token and client detail stays on infrastructure you control.
A booking page looks like a form over a calendar. The hard part is that every calendar system disagrees about which events make you busy, and once my code answered that question in two places, the two answers disagreed too.
Luka Breitig
8 July 2026 · 13 min read
Tymeslot 1.3 turns the built-in calendar into somewhere you can run your day, adds Apple iCloud sync, and relicenses the code under AGPLv3.
Luka Breitig
1 July 2026 · 4 min read
Four months after the first release, Tymeslot 1.0 does the whole scheduling job: booking pages, two-way calendar sync, video links, embedding, and five languages.
Luka Breitig
8 May 2026 · 3 min read
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