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Terms of Service

Last updated: March 2026

These terms govern your use of Klartion, a self-hosted application that syncs bank transactions to Notion. By purchasing or using Klartion, you agree to these terms.

Who these terms apply to

These terms are between you (the purchaser and user of Klartion) and David Alves, an independent software developer based in Portugal ("we", "us", "our"). You can contact us at [email protected].

What Klartion is

Klartion is a self-hosted application that connects to your bank via Enable Banking's open banking API and writes your transactions to a Notion database you own. It runs on your own hardware. Your data never passes through our servers.

Klartion is not a financial service, a bank, or a payment provider. It is a software tool that reads and organises data you already have access to.

Licence to use

Klartion's source code is released under the MIT licence with the Commons Clause. This means:

Licence keys

Each licence key allows activation on up to 2 machines. Keys are personal and non-transferable. A valid licence key is required to use Klartion — the application validates your key with Lemon Squeezy's licence API on activation and periodically during use.

If you need to move your installation to a new machine, you can deactivate your current instance from within the application before reinstalling.

Payment and refunds

Payments are processed by Lemon Squeezy, our merchant of record. They handle all payment processing, VAT, and invoicing. Their terms of service apply to the purchase transaction.

Because Klartion is a software product delivered immediately upon purchase, we do not offer refunds after your licence key has been activated. If you experience a technical issue that prevents you from using the product, contact us at [email protected] and we will work to resolve it.

Third-party services

Klartion relies on third-party services that are outside our control:

We are not responsible for outages, changes, or decisions made by these third parties that affect Klartion's functionality.

No warranty

Klartion is provided "as is", without warranty of any kind, express or implied. We do not guarantee that Klartion will be error-free, uninterrupted, or that it will accurately capture every transaction from your bank. Bank APIs can change without notice.

You are responsible for verifying the accuracy of data written to your Notion database. Klartion should not be used as your sole source of financial records.

Limitation of liability

To the maximum extent permitted by applicable law, David Alves shall not be liable for any indirect, incidental, special, consequential, or punitive damages arising from your use of Klartion, including but not limited to loss of data, missed transactions, financial loss, or business interruption.

Our total liability to you for any claim arising from these terms or your use of Klartion shall not exceed the amount you paid for your licence key.

Acceptable use

You agree to use Klartion only for lawful purposes and only to access bank accounts and Notion databases that you own or have explicit permission to access. You must not attempt to circumvent licence validation or use a single licence key on more machines than permitted.

Changes to these terms

We may update these terms from time to time. If we make material changes, we will update the date at the top of this page. Continued use of Klartion after changes constitutes acceptance of the updated terms.

Governing law

These terms are governed by the laws of Portugal. Any disputes shall be subject to the exclusive jurisdiction of the courts of Portugal, without prejudice to any mandatory consumer protection rights you may have under the laws of your country of residence.

Contact

For any questions about these terms, email [email protected].