The rules of using Letterss.

Last updated April 24, 2026.

These are the terms you agree to when you use Letterss. We've tried to keep them short and in plain language. If you don't agree with any of them, please don't use the app.

1. Who can use Letterss

You must be at least 13 years old to create an account. If you are under 18, you should have a parent or guardian's permission. By signing up, you confirm you meet these requirements.

You agree to provide accurate sign-up information and to keep your account credentials safe. You're responsible for everything that happens on your account.

2. Your letters belong to you

You own everything you write. We don't claim any ownership over your letters or images.

To run the service, you give us a narrow license to do the technical things needed to deliver letters: store them in encrypted form on our servers, route them to the recipient, and display them inside the app. This license ends when you delete the letter or your account.

3. What you can't send

Even though your letters are end-to-end encrypted and we can't read them, you agree not to use Letterss to send:

Harassment, threats, or stalking content directed at any person.
Hate speech or content advocating violence against people based on identity.
Sexually explicit content involving minors. This is non-negotiable and will be reported to the National Center for Missing & Exploited Children (NCMEC).
Doxxing or sharing someone's private information without consent.
Spam, phishing, scams, or impersonation.
Anything that violates the laws of your country or ours.

If a recipient reports a letter for any of the above, we will review the report. Because the letter contents are encrypted, our investigation is limited to metadata (sender, recipient, time), the report itself, and any plaintext the recipient chooses to share with us.

4. Reporting and blocking

Every received letter has a report option. Every contact has a block option. We take reports seriously and will, depending on severity, warn the sender, suspend the sender's ability to send letters, or terminate their account. Repeat or severe violations result in permanent removal.

5. The pace and structure of the app

Letterss is intentionally constrained:

Letters take three days to deliver after you send them.
Letters must be at least 300 words long to be sent.
You cannot send a second letter to the same recipient until they have received your previous one.

These rules are part of the product, not bugs. We may change the specific numbers (300 words, 3 days, etc.) over time as we learn what works, and we'll notify you in the app if we do.

6. Termination

You can delete your account at any time from inside the app. We may suspend or terminate your account if you break these terms, especially around prohibited content. We will normally try to warn you first, but we reserve the right not to in cases involving immediate harm or illegal activity.

When your account is terminated, your data is deleted as described in the Privacy Policy.

7. The app is provided "as is"

We try to keep Letterss running smoothly, but we don't guarantee that it will always be available, bug-free, or that letters will arrive at the exact second you expect. Letterss is provided "as is" without warranty of any kind, to the maximum extent allowed by law.

We are not liable for indirect, incidental, or consequential damages arising from your use of the app, including lost data or undelivered letters. This limitation applies even if we have been advised of the possibility of such damages.

Nothing in these terms limits liability that cannot lawfully be limited (for example, gross negligence, willful misconduct, or anything required by consumer-protection law in your jurisdiction).

8. Changes

We may update these terms occasionally. If a change is significant, we'll notify you in the app. Continuing to use Letterss after a change means you accept the updated terms.

9. Governing law

These terms are governed by the laws of the State of California, USA, without regard to conflict-of-laws rules. Any dispute will be resolved in the state or federal courts located in Alameda County, California, except where local consumer-protection law gives you the right to bring a claim where you live.

10. Contact

If anything in these terms is unclear, or you want to talk to a human, email [email protected].

Thanks for writing letters.