Privacy

Little Mayor is a game for children, so it collects as little as possible about them. Here is exactly what it stores, for how long and why.

In effect from 2 September 2026

The short version: the game has no sign-up, asks for no e-mail address and no name, and sets no cookies. The only thing that could be personal data is the nickname a child types into the daily leaderboard. That is why we ask, right next to the field, for a nickname rather than a real name. Nicknames are deleted after 30 days.

Who is responsible

What is stored

Data	Why	How long
Game result	Map, task, difficulty, score, title earned, list of problems in the town, date and time, booth or class label. It lets a teacher see a summary of the lesson and lets us improve the game.	Indefinitely, these are anonymous numbers
Random browser id	So the same game is not recorded twice when a submission is retried. It is a random string generated in the browser and cannot identify who played.	With the game result
Leaderboard nickname	Text the child types voluntarily when they want to appear on the daily leaderboard, plus the score and time. Leave it blank and nothing is stored.	30 days, then deleted automatically
Counters	How many times someone started a game, finished a town or saved a diploma. Plain monthly numbers with nothing attached.	Indefinitely
Site analytics	Cloudflare Web Analytics: aggregate page views. It uses no cookies, does not follow visitors across sites and builds no profiles.	Per Cloudflare settings
Browser storage	Chosen language, the player's own statistics, booth label and a queue of games not yet uploaded. It stays on the tablet or phone.	Until browser data is cleared

Where the risk is: the nickname field is free text. If a child types their full name and class into it, that becomes personal data and is shown to others on the daily leaderboard. That is why we ask for a nickname at the field, reject entries that look like a first and last name, and delete the whole leaderboard after 30 days. If something like that shows up anyway, write to us and we will remove it straight away.

What is not stored

No names, e-mail addresses, phone numbers or class identifiers.
No cookies and no advertising or tracking scripts.
No photos, audio or location. The game never even asks for them.
Nothing is sold or passed to third parties for marketing.

Our legal basis

Anonymous game results and counters are processed on the basis of our legitimate interest in running and improving the game. They are not personal data and cannot be traced to an individual child.

The leaderboard nickname is entered by the player, voluntarily, only if they want to appear on the daily leaderboard. Leaving it out does not affect the game.

Who can access the data

The data sits in a database operated by Cloudflare, which provides our hosting and storage. Cloudflare acts as a processor and accesses the data only to run the service.

Game summaries and the leaderboard are seen by the booth staff or the teacher running the lesson. The daily leaderboard is public in the sense that it is displayed in the room where the game is played.

Your rights

If a record concerns you or your child, you have the right to ask about it, have it corrected or deleted, have its processing restricted, and to object. Write to the contact address below and we will answer within two working days.

If we do not resolve it to your satisfaction, you can contact the Czech Office for Personal Data Protection, Pplk. Sochora 27, 170 00 Prague 7, uoou.gov.cz.

For schools, libraries and towns

You can forward this section to your data protection officer:

The game requires no sign-up and no login; children enter no name, e-mail or other identifier.
An anonymous game result is stored. It cannot be traced back to a child.
The only free field is an optional leaderboard nickname, deleted after 30 days. Both the lesson plan and the field itself ask for nicknames rather than names.
To switch the leaderboard off entirely, simply play without entering a nickname.
The game also runs fully offline. In that mode nothing is sent anywhere.

Changes to this page

If the way we process data changes, we will update this page and change the date at the top. A log of changes to the game itself is on the Changes page.