Privacy policy

Last updated 16 October 2026

This explains what Letternerd collects when you play, what we do with it, who else sees it, and how you can remove it. It covers letternerd.com and the apps that use the same service.

What we collect

Your account and profile

When you open Letternerd we create a guest account with a random ID. If you add an email address and password, we keep the address and a hashed password. If you sign in with Google, we keep the Google account identifier and the email address Google shares. Your profile has a display name, an optional @username and a picture or chosen face.

Your age, for 18+ games

To open or play a game rated 18+ you need an account and add your date of birth. We use it once to check that you are 18 or older. We keep the date and time you confirmed, and we do not keep the date of birth. This is a declaration you make; we do not check identity documents.

What you play and make

Rooms you host or join, your answers, votes and scores, results, Gold, XP and achievements. Games you create and publish, and ratings and reviews you leave. Friends, circles and what you post in them, reactions, blocks and the reports you send.

Pictures, audio, video and drawings

When a game asks for one and you submit it, we store it privately and share it with that room through time-limited links. It is checked by an automated moderation service before the room sees it. Your profile picture is public: anyone with its address can load it.

Spoken practice

If you use voice practice, your recording is stored, transcribed by a speech-to-text provider, and the transcript is sent to a language model that writes feedback. Only you see it. You can delete a recording from your practice review.

Revision and circles

When you review flash cards, the rating you give each card and the day it is due next are stored against your account, and only you see them. When a circle you are in pins a revision set, the circle can see counts for that set — how many members have started, how many revised today, and, once at least three members have rated a card, which cards most of them find hard. Those counts never name anyone and never show anyone’s own ratings. A set’s exam date is shared with the circle and is used to bring the cards you have reviewed round again before it. Your review streak is shown to friends only if you turn that on.

You can add questions to a set your circle has pinned. A question you add, and the answer and source you give with it, are visible to everyone in that circle with your name on it, and are marked as unchecked. Any other member can flag a question as wrong; you are told it was flagged, not by whom, and who flagged it is shown to nobody. Questions are screened for personal details and abusive language, and are removed with the circle or if you remove them; if you delete your account they stay, without your name. When your circle plays a quiz of a set, it is made as a link-only game of the person who started it, so anyone they share the room with can see its questions.

Ask-me links

If you make an ask-me link, its question and answer choices are public to anyone with the link, with your name and picture beside them. When you answer someone’s link, they see what you wrote or picked but never your name. We keep which account sent each answer so we can act on reports, mutes and abuse; nobody else is shown it. An answer appears on the link’s page only if its owner shares it. Written answers are screened for personal details and abusive language before they are delivered.

AI features

Some features send text to AI language models: AI players’ answers, recaps, building a game from a description, a document or a link, and optional play memories and learning feedback. Play memories use what your circle has played to suggest better games; they are on by default and you can turn them off, view them and erase them in Settings under Privacy & safety.

Notifications

If you turn on browser notifications, your browser gives us a push subscription address so we can send reminders and turn alerts. You choose which kinds in Settings and can turn them off at any time.

Technical data

Our servers log requests, including IP address, browser and device type, and the pages and actions used, to keep the service running, to limit abuse and to investigate problems. Your browser stores your session and a few preferences in local storage so you stay signed in. We use Google Analytics, which sets cookies and sends your IP address, browser and the pages you view to Google so we can see how many people use Letternerd and which pages they reach. We do not use cookies for advertising.

How we use it

• To run the games, scores, leaderboards, friends and circles you ask for.
• To sign you in, and to send the codes you request for email changes, password resets and deleting an account.
• To keep people safe: checking media, reading reports, blocking abuse and enforcing the community rules.
• To suggest games and write recaps and feedback, when those features are on.
• To secure the service, fix faults and understand whether it is working.

Who else sees it

Other players. People in a room see your display name, avatar and what a round makes public. Published games show their maker and ratings. Leaderboards and creator pages are visible to others.

Service providers. We use these to run Letternerd, and they process data only for that:

• Cloudflare: hosting, delivery, storage of media and profile pictures, and request logs.
• A database server we operate: your account and game data.
• Resend: sending sign-in and confirmation emails.
• Google: sign-in with Google, Gemini models for AI features (AI players, recaps, game building and feedback), and Google Analytics for site usage statistics.
• OpenAI: media moderation and speech-to-text for room audio and voice practice.
• Unsplash and Pexels: short search phrases to find a stock cover picture for a generated game.
• Your browser’s push service (Google, Apple, Mozilla or similar): delivering notifications you opted in to.

When the law requires it, or to protect people from serious harm, we may disclose information to the authorities. We do not sell personal information or share it for advertising.

How long we keep it

We keep your account data while your account exists. Finished rooms are kept as a record so that scores, results and leaderboards stay correct for everyone who played. Server logs are kept for a limited period for security and debugging.

Deleting your account

Open Settings, scroll to Delete account, and confirm. If you have an email on the account we send a 6-digit code to it; a guest confirms by typing a word. Deleting is permanent.

When you delete your account we remove:

• Your sign-in details, sessions and email codes.
• Your notification and push settings and subscriptions, and your inbox.
• Your friendships, follows, blocks and circles you owned (ownership passes to the longest-standing member where there is one).
• Your practice sessions, recordings, learning data, settings, saved games and play memories.
• Your ask-me links with every answer to them, and the answers you sent to other people’s links.
• Private and unlisted games you made, which are archived out of sight.

What stays:

• Your profile row, emptied: your name becomes “Deleted player” and your username and picture are removed.
• What you wrote in a finished room stays in that room’s record for the others who played, shown as “Deleted player”.
• Games you published to everyone remain playable, with no owner shown.
• Your Gold and XP ledger, kept for audit.

You can also remove things without deleting the account: erase play memories, delete a voice recording, remove your profile picture, leave a circle or block a player.

Your choices and rights

Most controls are in Settings: your name and username, notifications, play memories, learning feedback, who can invite you, blocked players and the reports you sent. Depending on where you live, such as the EU, the UK or California, you may have the right to access, correct, delete, restrict or export your personal data, and to object to some processing. To use a right, or to ask a question about your data, email hello@letternerd.com. We may need to confirm it is your account first.

Children

Letternerd is for people 13 and older, and 18+ games are for adults. We do not knowingly collect personal information from anyone under 13. If you think a child has made an account, email us and we will delete it.

Where your data is processed

Letternerd runs on Cloudflare’s global network and on servers we operate, and our providers work internationally, so your information may be processed outside the country you live in. We rely on those providers’ contractual and technical safeguards.

Security

Passwords are hashed, media is private and served through time-limited links, and access to account data is limited to what each part of the service needs. No service is perfectly secure, so please use a password you do not use elsewhere.

Changes to this policy

When we change this policy we update the date at the top, and for material changes we tell you in the app before they take effect.

Contact

Questions or requests: hello@letternerd.com. See also the terms of service and the community rules.