Privacy policy
Who is responsible
Aleksandr Podlubnoi (Александр Подлубный). Privacy and support contact: mathgardeninfo@mail.ee. This policy applies to Math Garden / «Сад чисел». Date: October 31, 2026.
No data collection by the app
The app requires no account and does not send exercise results or device identifiers to the developer. It has no advertising, tracking, third-party analytics or backend server. Exercises work offline. The app does not request a child’s name, age, location, photos or contacts.
Data stored on your device
Your device stores the latest 20 completed attempts: problems, entered answers, date, duration, score and repeat number. Each repeat counts as a separate attempt. The choice of 10 or 20 problems is also saved. Random set and attempt identifiers only link local records; they do not track users. Saving an attempt beyond the limit removes the oldest record. An update trims longer histories to the latest 20 attempts.
Deletion and backups
You can delete exercise history in the Parents section. Deleting the app, rather than offloading it, removes its local data. Depending on your Apple settings, app data may be included in device backups; restoring a backup may restore older records. The app has no device-to-device sync of its own. Manage system backups in your Apple settings.
Adding results to a calendar
Only after device-owner authentication and your action does the app open the system event editor with results, problems and answers. You choose the calendar and confirm saving, or cancel. There is no automatic export. The app does not request full calendar access or read existing events. Saved events may sync through iCloud, Google or another provider of the selected calendar, according to your settings. Deleting app history does not delete calendar events; manage those in your calendar.
Adult access
The Parents section and calendar editor use system device-owner authentication: Face ID, Touch ID or the device passcode. The app receives only the authentication outcome, not biometric data or the passcode. This is not age verification: a child who can authenticate on the device can also pass this check.
Support email
If you choose to email mathgardeninfo@mail.ee, the author receives your email address and message to respond and resolve your request. Email is processed by the mail.ee mail provider. Please do not send a child’s name or other unnecessary personal information. Messages are kept while resolving the request and necessary follow-up, then deleted unless retention is required by law. The legal basis is the legitimate interest in supporting users and responding to requests.
Your rights and policy updates
For access to support correspondence data, correction, deletion, restriction or objection, contact mathgardeninfo@mail.ee. Where applicable, you may request data portability and complain to a data protection authority. The developer cannot access the local exercise history on your device. This policy will be updated if data practices change; its current date appears above.
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