Last updated: September 2026
These Terms of Use govern your use of the "JustALetter" mobile app and the associated website (together, the "Service"). The provider and your contractual partner is:
Christopher Reinhardt
Potsdamerstraße 9
63322 Rödermark
Germany
E-Mail: support@justaletter.app
By registering for or using the Service, you agree to these Terms of Use. Any conflicting terms are hereby rejected.
JustALetter is an intentionally minimal messaging service: two connected people can send each other one message per day per connection. Each account can be connected to up to 2 other people (up to 3 with an active Premium subscription). This limitation is the core of the Service and remains in place; paid features only expand expression and the number of connections, not the daily message frequency per connection.
The free version of the Service may contain advertising in the form of flyers shown before you open a received letter; an active Premium subscription removes this advertising. Advertising content originates from advertising partners. The respective advertising partner is responsible for the content of linked external websites; we accept no liability for it. For details on data processing, see our Privacy Policy.
You must be at least 16 years old to use the Service. If you are younger, use is only permitted with the consent of a parent or legal guardian. You warrant that the information you provide upon registration is accurate.
An account is required to use the Service. You can sign in with email/password, Sign in with Google, or Sign in with Apple. You are responsible for keeping your credentials confidential and for all activity under your account. Please notify us immediately if you suspect unauthorized access.
To use the Service, you connect with other people via an invite code or shareable link, up to your account's connection limit (see Section 2). You may only send invitations to people you genuinely wish to connect with. You can end a connection at any time. An invite code is valid for 72 hours.
You may attach a letter to an invitation, to be delivered once someone redeems the code. Please note that whoever redeems the code receives both the connection and the attached letter: the code identifies nobody. Share it only with the person the letter is meant for, and do not publish it. You can withdraw an invitation at any time while it is unredeemed; the letter is then not delivered and stays in your drafts. The same content rules apply to such a letter as to any other message (see Section 6).
If two people connect again after ending a connection, a new chapter begins. Earlier chapters between the same two people are unaffected and remain viewable separately.
When a connection is ended, the running chapter is closed and remains accessible to both people. Each person can individually delete a closed chapter from their app ("Delete chapter"). As long as only one person has deleted a chapter, the messages are retained, as they form part of the other person's correspondence. Only once both people have deleted the same chapter are the associated messages and media permanently and irreversibly deleted, after a retention period of 2 years intended to preserve evidence in connection with unlawful content. Other chapters between the same two people are unaffected. For details, see our Privacy Policy.
You are solely responsible for the content you create (messages and any media). By design, your messages are transmitted to and visible by the person you are connected with. In particular, you must not send content that:
We do not actively monitor content: letter content and attachments are stored encrypted, and no automated screening takes place (for details and the limits of that encryption, see Section 15 of our Privacy Policy). If a letter is reported to us via the report function, we decrypt that specific letter in order to review the report. Upon substantiated indications of violations, we reserve the right to remove content and/or suspend accounts.
You retain all rights to your content. You grant us only the simple, non-exclusive right necessary to provide the Service — namely to store, technically process, and transmit your content to the person you are connected with. We do not use your content beyond this.
The Service is free in its basic version. Optional paid features (e.g. extended messages, media, full history) may be offered in the future as a one-time purchase or subscription. In that case, purchase and billing are handled by the respective app store (Apple App Store or Google Play), whose terms additionally apply. Subscriptions renew as stated in the app store unless cancelled in time; management and cancellation take place via your app store account settings.
We reserve the right to further develop and optimize the visual design of paid content (e.g. letter paper and envelope designs), including after it has been unlocked. Access to the respective design category as such remains unaffected; there is no entitlement to permanent retention of a particular visual appearance.
We strive for trouble-free operation but do not warrant any particular availability. Maintenance, technical faults, or force majeure may lead to temporary limitations. We reserve the right to further develop, change, or discontinue features insofar as this is reasonable for you. Discontinuation of the service as a whole is governed by Section 10.
Updates and supported versions. We continuously develop the app and provide updates through the respective app store. For security or compatibility reasons (for example changes to the encryption or to the server interfaces) it may be necessary for you to install the current version in order to keep using the service. We do not support older versions indefinitely; we may block access with an outdated version until the update has been installed. Where possible we announce this in the app beforehand. Use of the service requires a device running an operating system version supported by the app stores and by us. If you cannot install a required update on your device, Section 10 applies accordingly to an ongoing Premium subscription (termination and pro-rata refund).
In connection with this we may deliver service messages to you as a letter in your mailbox – about a new feature, after an outage, or to say thank you. Such letters concern the service itself and are not advertising. If you have allowed notifications they arrive with a push notification, which you can turn off at any time under Settings → Notifications → “News from Just a Letter”. We may afterwards correct or withdraw such a message, in which case it disappears from your mailbox. Push notifications that have already been delivered cannot technically be recalled. None of this applies to the letters you exchange with other people: we do not change those.
Promotional messages – for example about paid features or offers – are sent only if you have first explicitly opted in within the app (Settings → Notifications → “Offers from Just a Letter”). That setting is off by default and can be withdrawn at any time. Without your consent you receive no promotional letters. Service messages about the service itself are not affected by this.
You may delete your account at any time via the app settings, thereby ending the usage relationship. We may terminate the usage relationship for good cause — in particular for serious or repeated breaches of these Terms — with immediate effect, or suspend the affected account.
Upon account deletion, your user profile, authentication account, and any open invitations are deleted immediately. Active connections are automatically archived; the people you were connected with retain access to the shared letter history. Letters you have already sent remain with the recipient, as they form part of the recipient's own correspondence. A security record is retained for up to 2 years for content moderation purposes and to enable account restoration at your request. For details, see our Privacy Policy.
Inactive accounts. If an account has not been used for 24 months, we may delete it and thereby end the usage relationship. We announce the deletion at least 30 days in advance by e-mail to the address on file; if you open the app within that period, the account remains. The preceding paragraph applies to the consequences of the deletion.
Storage of attachments. Photos and drawings are stored at a resolution sufficient for display in the app. To save storage space we may store attachments, in particular older ones, at a reduced resolution or with stronger compression. There is no entitlement to permanent retention at the original file size; the content and visibility of the letters remain unaffected.
Discontinuation of the service. We may discontinue the service as a whole, in particular if operating it is no longer economically or technically sustainable. In that case we will announce the discontinuation at least 30 days in advance, by a service letter in your mailbox and by email to the address on file with us, and state the date from which the service will no longer be available. Running Premium subscriptions will not renew after the announcement; for periods you have already paid for that extend beyond the discontinuation date, you will receive a pro-rata refund. Please save any letters and photos you wish to keep before that date. After discontinuation we irreversibly delete all user data, including every letter, photo, and drawing, from our servers. The retention periods described in this Section then no longer apply, unless statutory retention obligations require otherwise.
We are liable without limitation for damages arising from injury to life, body, or health, and for damages based on intent or gross negligence, as well as under the German Product Liability Act. For slightly negligent breaches of material contractual obligations (cardinal obligations), our liability is limited to the foreseeable damage typical for this type of contract. Otherwise, liability is excluded. For services provided free of charge, we are liable only for intent and gross negligence.
If you, as a consumer, enter into a paid contract (e.g. a subscription), you generally have a statutory 14-day right of withdrawal. For digital content, the right of withdrawal expires once performance has begun with your express consent before the end of the period and you have confirmed your acknowledgement of the loss of the right. Where a purchase is made through an app store, that store's refund terms additionally apply.
We reserve the right to adapt these Terms of Use where this is necessary for objective reasons (e.g. legal changes, new features). We will notify you of material changes in an appropriate manner. If you do not object within the notified period or continue to use the Service, the amended Terms are deemed accepted.
The law of the Federal Republic of Germany applies, excluding the UN Convention on Contracts for the International Sale of Goods; mandatory consumer-protection provisions of the country of your habitual residence remain unaffected.
The European Commission provides a platform for online dispute resolution (ODR): https://ec.europa.eu/consumers/odr. We are neither obliged nor willing to participate in dispute resolution proceedings before a consumer arbitration board.
Should any provision of these Terms be or become invalid, the validity of the remaining provisions shall remain unaffected. Statutory provisions shall apply by way of supplementary interpretation.
For questions about these Terms of Use, contact us at: support@justaletter.app