Draft for legal review. This describes what the game actually does today. The parts in [square brackets] must be filled in, and a lawyer should review the whole policy before the game is offered to the public.
Number Knights privacy policy
Version 2026-11-10
Number Knights (numberknights.com) is a math and learning game for children. It is run by [operator name] (“we”), contact: [contact email], [mailing address]. This policy explains what we keep, why, who can see it, and the choices parents and guardians have. We follow the Children’s Online Privacy Protection Act (COPPA).
Who signs up
Only a parent or guardian (18 or older) can create a family account. Children don’t sign up and don’t type in an email or any contact details. A grown-up adds each child as a player inside the family account, and a 4-digit grown-up PIN keeps children out of the settings.
What we keep
| What | Why |
|---|---|
| The grown-up’s email address and password (the password only as a one-way hash we can’t read) | To sign in, and to let other families send friend requests |
| The grown-up PIN (only as a one-way hash) | To keep children out of the grown-up settings |
| Each player’s first name or nickname and color | So children can pick themselves on any family device |
| Each player’s game progress: topics practiced and mastered, scores, answers right and wrong, clothing and characters earned | To choose the right questions, save the game, and show grown-ups progress reports |
| Friends: which families you have added and asked, and emails you sent friend requests to | So friends’ children can play together |
| When the account was created, last signed in and last used; sign-in tokens for each device | To keep devices signed in, end old sign-ins, and delete accounts that are no longer used |
| Counts of how often each question is answered right and wrong, with no name or account attached | To find and fix confusing or wrong questions |
We don’t ask for children’s full names, photos, voices, locations, birthdays, schools or contact details, and children can’t chat with each other in free text. A game only needs the questions they answer.
Who can see it
- Your family: anyone using a device signed in to your account sees the players; the grown-up settings and reports need the PIN.
- Families you become friends with (both of you must say yes) see your account email, your players’ names, and your players’ live games, which their children can join. You can unfriend at any time.
- Us: the person running the game can see account emails, player names and how many questions each player answered, to keep the game working and answer questions from families.
- Our hosting provider [name] stores the data for us under a contract that requires it to keep the data confidential and secure and use it for nothing else.
There are no ads, no tracking or analytics services, and no third-party scripts in the game. We don’t sell or rent information, and we don’t share it with anyone else, except if the law requires it.
How long we keep it
- A device’s sign-in ends after 60 days without use, and after one year in any case.
- A family account that nobody has used for 2 years is deleted, with all its players and progress.
- When you delete your account, it is deleted right away. [Backups are kept for up to N days, then removed.]
- The anonymous question counts are kept to keep improving the questions.
Your choices as a parent or guardian
- See it: open Grown-ups (with your PIN) to see each player’s progress.
- Download it: Grown-ups → Your family’s data → Download our data gives you everything we keep about your family in one file.
- Change it: reset a player’s progress, or remove a player, in Grown-ups.
- Delete it: Grown-ups → Your family’s data → Delete this family account deletes the account and every player for good. This also withdraws your consent.
- Or contact us at [contact email] and we will help.
Keeping it safe
Passwords and PINs are stored only as salted one-way hashes. [Connections use HTTPS. Data is encrypted where it is stored, access is limited to the people who run the game, and we keep a written security program.] If information is ever exposed, we will tell affected families as the law requires.
Changes to this policy
If we change what we keep or who can see it, we will update this page and ask a grown-up to agree again before the family keeps playing.