Terms of use

Last updated 5 September 2026

This is a translation, provided for convenience. The Dutch version is legally binding; where they differ, the Dutch text applies.

Parties

Letrin is provided by Swendoz Studio, a sole proprietorship under Dutch law. Postal address: TDPB 72922169, c/o Immobilien Jürgen Hoddenkamp, Asselner Hellweg 116, 44319 Dortmund, Germany. Contact: [email protected].

These terms apply to your use of the Letrin app and of this website. By using Letrin you accept them.

The service

On your phone, Letrin reads a photo of a letter, helps you cover the personal details in it, and explains in your own language what it says and what is asked of you. The app can draft a reply and remind you before a deadline.

Not advice

Letrin does not provide legal, tax, immigration or financial advice. The explanation is produced by an AI model and may be incorrect or incomplete; always check dates, amounts and deadlines against the original letter. Reply letters are drafts that you review and send yourself; Letrin sends nothing on your behalf. Reminders are scheduled by your phone and are not a guarantee.

Rules of use

• Use Letrin for your own letters, or to help others at their request.
• Do not submit content you are not allowed to share, and do not use the service unlawfully.
• Do not attempt to overload the service, circumvent its limits or reverse-engineer it.
• You must be 16 or older.

In the event of a breach we may refuse the service to the device concerned. That refusal hangs on the device rather than on the installation, so reinstalling does not lift it.

Free credits, Letrin Plus and credit packs

Every device receives three free explanations. That counter is per device, not per installation. After that there are two options: Letrin Plus, a subscription of 20 credits per 30 days, or credit packs bought once that do not expire.

• A period runs from one payment to the next: a renewal restores the 20 credits. Unused credits lapse at the end of the period.
• Purchased credits do not expire and are used only once the subscription allowance is spent.
• Payment is made through your App Store or Google Play account. A subscription renews automatically unless cancelled in your store account at least 24 hours before the current period ends. Deleting the app does not cancel the subscription.
• A price change takes effect only after the store has informed you and, where the rules require it, you have agreed to it.

Right of withdrawal

Explanations, reply drafts and credit packs are digital content supplied immediately. By confirming the purchase you consent to immediate performance and acknowledge that you thereby lose your fourteen-day right of withdrawal (article 6:230p(g) of the Dutch Civil Code). Apple and Google are the sellers; refunds are handled by them under their own terms.

Availability

We make reasonable efforts to keep the service available, but do not guarantee uninterrupted availability, the accuracy of every explanation, or the continued existence of any particular feature. We may modify or discontinue the service.

Liability

The service is provided as is. To the extent permitted by law, we are not liable for decisions you take on the basis of an explanation, for a missed deadline, for a reminder that did not arrive, or for indirect and consequential loss. Liability for intent or wilful recklessness, and your mandatory rights as a consumer, remain unaffected.

Personal data

The processing of personal data is governed by the privacy statement, which forms part of these terms.

Changes

We may amend these terms. When we do, the date above this page changes; the app does not show the new version. Where an amendment affects you, we say so in the release notes of the update that brings it. Continued use constitutes acceptance.

Governing law and disputes

Dutch law applies. As a consumer you retain the protection of the mandatory law of your country of residence. Please raise any dispute with us first at [email protected]. If we cannot resolve it together, you may turn to a dispute resolution body in your country of residence or to the competent court.