Terms of Service

Effective date: 2026-05-23 · Version: 1.0

1. Introduction

Welcome to CalPair ("Site" and "Service"). This website and service is owned and operated by iPSUM engineering e.K. (Owner: Thomas Jordan) from Germany. By visiting our site and/or using our calendar synchronization service, you agree to be bound by the following terms and conditions.

2. General Information

What we do: CalPair provides a Software-as-a-Service (SaaS) solution for bidirectional synchronization between Google Calendar and Microsoft Outlook calendars.

Operating entity: CalPair is a service offered by iPSUM engineering e.K., registered with the Commercial Register at Amtsgericht Königstein im Taunus (HRA 3652). Any terms referring to "CalPair", "we", "us" and "our" refer to iPSUM engineering e.K.

3. Use of Service

To use CalPair, you must connect your third-party calendar accounts (Google and/or Microsoft) via OAuth. You grant us permission to read, create, modify, and delete calendar events strictly for the purpose of keeping your connected calendars in sync. You agree not to use the Service for any unlawful, abusive, or automated scraping purposes.

Attendee Data: If you synchronize calendar events that include third parties (attendees), you assure that you have the right to process this data and that the synchronization of the invitation is coordinated with the third parties. We process this data ephemerally during the sync and do not persist attendee email addresses in our database.

4. Payment, Subscriptions & Right of Withdrawal

Pricing & Billing: Paid tiers (Basic, Pro) are currently assigned by CalPair administrators. Online billing via Stripe or another payment provider is planned but not yet active. When billing goes live, prices will be shown in Euros and subscriptions will be billed in advance on a recurring basis (monthly or annually).

Cancellations: Once paid billing is active, you will be able to cancel your subscription; cancellation will take effect at the end of the current paid billing cycle. Until then, contact us at hello@calpair.io for tier changes.

Right of Withdrawal for Consumers (EU)

If you are a consumer residing in the EU, you have the right to withdraw from this contract within 14 days without giving any reason. The withdrawal period expires 14 days from the day on which the contract is concluded (i.e., when you complete your subscription purchase).

To exercise the right of withdrawal, you must inform us of your decision by an unequivocal statement (e.g., by email):

iPSUM engineering e.K., Nassauer Str. 2, 65817 Eppstein, Germany
Email: hello@calpair.io

To meet the withdrawal deadline, it is sufficient that you send your notice before the withdrawal period expires.

Effects of withdrawal: If you withdraw, we will reimburse all payments received from you, without undue delay and no later than 14 days after we receive your withdrawal notice. We will use the same means of payment you used for the initial transaction unless expressly agreed otherwise; you will not incur any fees as a result.

Loss of right of withdrawal for digital services: By completing your subscription purchase and actively using CalPair's synchronization service before the 14-day withdrawal period has expired, you expressly consent to the immediate commencement of the service and acknowledge that you thereby lose your right of withdrawal upon full performance of the service (§ 356 (5) BGB).

Model Withdrawal Form

(Complete and return this form only if you wish to withdraw from the contract.)

To: iPSUM engineering e.K., Nassauer Str. 2, 65817 Eppstein, Germany
Email: hello@calpair.io

I/We (*) hereby give notice that I/We (*) withdraw from my/our (*) contract for the provision of the following service:

Ordered on (*):
Name of consumer(s):
Address of consumer(s):
Signature of consumer(s) (only if this form is submitted on paper):
Date:

(*) Delete as appropriate.

5. Limitation of Liability

CalPair is provided on an "AS IS" and "AS AVAILABLE" basis. We strive for reliable synchronization but do not guarantee uninterrupted availability. You are responsible for maintaining backups of your critical calendar data.

Scope of liability: iPSUM engineering e.K.'s liability for damages is limited as follows:

Liability for intent (Vorsatz) and gross negligence (grobe Fahrlässigkeit) is unlimited.
For slight negligence (einfache Fahrlässigkeit), liability only applies if a material contractual obligation (Kardinalpflicht) has been breached — i.e., an obligation whose fulfillment is essential to the proper execution of this contract and on whose compliance you may regularly rely. In such cases, liability is limited to the typically foreseeable damage at the time the contract was concluded.
The above limitations do not apply to liability for injury to life, body, or health, claims under the German Product Liability Act (ProdHaftG), or any other mandatory statutory liability.

6. Termination

You may terminate your account at any time by disconnecting your calendar accounts and deleting your profile from the dashboard.

We reserve the right to suspend or terminate your access to the service for good cause (wichtiger Grund), in particular if you materially breach these Terms (including, but not limited to, attempting to circumvent Tier limits, unauthorized use, or abusive behavior). Where feasible, we will notify you before suspension and give you an opportunity to remedy the breach.

7. Contact Us

For any questions, complaints, or queries, kindly get in touch:
Email: hello@calpair.io
Security/Abuse: security@calpair.io

8. Governing Law and Jurisdiction

These Terms are governed by the laws of the Federal Republic of Germany. For consumers, the mandatory protective provisions of the law of the consumer's country of habitual residence shall apply in addition. For disputes with consumers, the courts having jurisdiction at the consumer's place of residence shall have jurisdiction. For disputes with business customers, the courts of Eppstein, Germany shall have exclusive jurisdiction.

9. Changes to These Terms & Severability

We may update these Terms from time to time. Material changes will be communicated to registered users by email or via a notice upon next login, with reasonable advance notice. Continued use of the Service after the effective date of changes constitutes acceptance.

If any provision of these Terms is found to be invalid or unenforceable, the remaining provisions shall continue in full force and effect.