Last updated: November 18, 2025
The rules of the road. Read them. Use the service fairly.
Caltsu is operated by:
DataDux Oy
Business ID: 3427414-9
Registered in Finland
Address: Huopalahdentie 24, 00350 Helsinki
Email: legal@caltsu.com
By accessing or using Caltsu ("Service"), you agree to be bound by these Terms of Service ("Terms"). If you disagree with any part of the terms, you may not access the Service.
These Terms apply to all visitors, users, and others who access or use the Service.
Caltsu provides calendar synchronization services that:
Connect to your calendar accounts (Google, Microsoft, Apple)
Create blocking events to show availability across calendars
Sync events automatically based on your configuration
We reserve the right to modify or discontinue, temporarily or permanently, the Service (or any part thereof) with or without notice.
You must provide accurate and complete information when creating an account. You are responsible for maintaining the security of your account credentials.
You are responsible for all activities that occur under your account. Notify us immediately of any unauthorized use.
We reserve the right to suspend or terminate your account at any time for violations of these Terms or for any other reason we deem appropriate.
YOU MAY NOT:
Use the Service for any illegal purpose or violate any laws
Attempt to gain unauthorized access to the Service or related systems
Use the Service to transmit viruses, malware, or harmful code
Reverse engineer, decompile, or attempt to extract source code
Use the Service to spam, harass, or abuse others
Resell or redistribute the Service without authorization
Create fake accounts or impersonate others
By connecting your calendar accounts, you grant Caltsu permission to:
Read event times and availability from your calendars
Create, update, and delete blocking events
Receive webhook notifications about calendar changes
You can revoke these permissions at any time by disconnecting your accounts from the dashboard.
We offer Free, Pro, Business, and Enterprise plans. Pricing is available on our website and may change with 30 days notice.
Paid plans are billed monthly or annually in advance. All fees are non-refundable except where required by law.
New users get a 14-day Pro trial. Your subscription begins after the trial ends unless you cancel. No credit card required for trial.
You may cancel your subscription at any time. Access continues until the end of your billing period. No refunds for partial months.
Your use of the Service is also governed by our Privacy Policy.
You retain all rights to your calendar data. We only access what's necessary to provide the Service.
You can delete your account at any time. We will delete your data within 30 days, except for data we're required to retain by law.
The Service and its original content, features, and functionality are owned by Caltsu and are protected by international copyright, trademark, and other intellectual property laws.
You may not copy, modify, distribute, sell, or lease any part of our Service without explicit written permission.
THE SERVICE IS PROVIDED "AS IS" WITHOUT WARRANTIES OF ANY KIND.
We do not warrant that:
The Service will be uninterrupted or error-free
Defects will be corrected
The Service is free of viruses or harmful components
You use the Service at your own risk. We are not responsible for calendar sync failures, missed appointments, or scheduling conflicts resulting from Service use.
TO THE MAXIMUM EXTENT PERMITTED BY LAW:
Caltsu shall not be liable for any indirect, incidental, special, consequential, or punitive damages, including loss of profits, data, use, or goodwill.
Our total liability shall not exceed the amount you paid us in the 12 months preceding the claim, or $100, whichever is greater.
You agree to indemnify and hold Caltsu harmless from any claims, damages, losses, liabilities, and expenses (including legal fees) arising from:
Your use of the Service
Your violation of these Terms
Your violation of any rights of another party
We may terminate or suspend your account immediately, without prior notice, for any reason, including breach of these Terms.
Upon termination, your right to use the Service will cease immediately. All provisions that should survive termination shall survive.
We reserve the right to modify these Terms at any time. We will notify you of material changes via email or a notice in the dashboard.
Your continued use of the Service after changes constitutes acceptance of the new Terms.
These Terms shall be governed by and construed in accordance with the laws of Finland, without regard to its conflict of law provisions.
Any disputes arising from these Terms or the Service shall be resolved in the courts of Finland. For consumer disputes, you also have the right to contact the Finnish Consumer Disputes Board (kuluttajariita-autokunta.fi).
Questions about these Terms? Get in touch: