Kalender Sync
Connects Google, Outlook, iCloud and other calendars so ChatGPT can find free time and book events.
What Kalender Sync can do in ChatGPT
Ask about your schedule across all calendars.
Free Slot Finder
Find open time of the length you need.
Appointment Lookup
Check what is planned for any day or afternoon.
Event Booking
Create new events in your calendar by asking.
Many Calendar Sources
Google, Outlook, iCloud, GMX, WEB.DE, CalDAV and iCal.
Per Calendar Privacy
Share free/busy, title and time, or full details.
You stay in control
You approve access, and you can disconnect Kalender Sync at any time.
Apps 1
What Kalender Sync does in ChatGPT
The Kalender Sync plugin links your calendars to ChatGPT so it can answer questions about your schedule. It works with Google, Microsoft Outlook, Apple iCloud, GMX, WEB.DE and any CalDAV or iCal source, and can find open time, look up appointments and create new events for you.
You choose for each calendar how much ChatGPT is allowed to see: only whether you are free or busy, the title and time, or the full details. Calendars you do not share stay hidden. The listing says these limits are enforced on Kalender Sync's servers rather than left to the AI.
The service runs on servers in Germany under GDPR, and a data processing agreement is available. That may matter for businesses in Europe that need to show where calendar data is handled. It also means you can let ChatGPT plan around a work calendar without showing it what each meeting is about.
Who it is for
- People with several calendars to juggle
- European businesses that care about GDPR
- Anyone who wants to share free/busy only
How to add Kalender Sync to ChatGPT
- Open the Kalender Sync listing in ChatGPT ↗.
- Click Install plugin.
- Sign in to your Kalender Sync account when asked and approve the access it requests.
- Start a chat and ask for what you need, mentioning Kalender Sync if ChatGPT does not pick it up.
- To stop, disconnect Kalender Sync under apps in your ChatGPT settings.
Questions about Kalender Sync
What is the Kalender Sync ChatGPT plugin?
The Kalender Sync plugin links your calendars to ChatGPT so it can answer questions about your schedule. It works with Google, Microsoft Outlook, Apple iCloud, GMX, WEB.DE and any CalDAV or iCal source, and can find open time, look up appointments and create new events for you. It is listed in ChatGPT's plugin marketplace under Productivity.
What can I ask Kalender Sync to do in ChatGPT?
For example: "When am I free for two hours this week?", "What's on my calendar tomorrow?", "Do I have anything Thursday afternoon?".
Who makes the Kalender Sync plugin for ChatGPT?
The ChatGPT listing names PPJ Venture Labs UG (haftungsbeschränkt) as the developer. The version listed on 8 October 2026 was 1.2.0.
How do I add Kalender Sync to ChatGPT?
Open the Kalender Sync listing in ChatGPT, click Install plugin, sign in to your Kalender Sync account and approve the access it asks for. Then ask for what you need in a chat, mentioning Kalender Sync if ChatGPT does not pick it up.
Can Kalender Sync change things in my account, or only read?
It reads the calendars you choose to share, at the detail level you set for each one, and can create events. Unshared calendars stay invisible.
Who is the Kalender Sync plugin for?
People with several calendars to juggle, european businesses that care about GDPR and anyone who wants to share free/busy only.
Which calendars does Kalender Sync support?
Google, Microsoft Outlook, Apple iCloud, GMX, WEB.DE and any CalDAV or iCal source.
Can I limit what ChatGPT sees in my calendar?
Yes. Per calendar you pick free/busy only, title and time, or full details, and the limits are enforced on Kalender Sync's servers.
Where is my calendar data processed?
On servers in Germany under GDPR, with a data processing agreement available.
Does Kalender Sync see my ChatGPT chats?
When Kalender Sync is connected, ChatGPT may share the parts of your chats and memories that matter for a request with Kalender Sync. What Kalender Sync does with that data falls under its own terms and privacy policy. ChatGPT keeps your training-data settings, and you can disconnect at any time.
How do I disconnect Kalender Sync from ChatGPT?
Open your ChatGPT settings, go to apps, and disconnect Kalender Sync. You can reconnect later from the listing.
What are alternatives to Kalender Sync in ChatGPT?
Similar plugins in the ChatGPT marketplace include Google Calendar, Adzviser and AIOProductOS. Each has its own page in this directory.
Privacy and your data
When Kalender Sync is connected, ChatGPT may share the parts of your chats and memories that matter for a request with Kalender Sync. What Kalender Sync then does with that data falls under its own terms and privacy policy, not only OpenAI's. ChatGPT keeps your training-data settings for data that comes from connected apps, and you can disconnect at any time.
Kalender Sync privacy policy ↗Kalender Sync terms ↗OpenAI: apps in ChatGPT ↗