Data and privacy for Math Facts
This app follows the Model Teaching Apps Privacy Notice. This page covers only what is specific to Math Facts.
What we store on your device
Everything below lives in localStorage or sessionStorage on your browser. None of it is sent anywhere, with one exception: when you generate a worksheet PDF (see below).
| Item | What it holds | How long it lasts |
|---|---|---|
| Anonymous device ID | A random identifier used to group your own data on this device. Never sent anywhere, never connected to your identity. | Until you clear it |
| Preferences | Theme choice, celebration effects default, and the clear-on-close toggle. | Until you clear it |
| Saved worksheet templates | Configuration only: operation, digit range, problem count, and layout, plus any title you typed. No student names or scores. | Until you clear it |
| Saved practice builds | Configuration only: operations, digit range, problem count, and timing for the Practice and Flashcards setups you save, plus the name you give each one. No student names or scores. | Until you clear it |
| Active session | The problems and answers for your current Practice or Flashcards session. | Until you close this browser tab |
| Analytics opt-out flag | Set only if you have turned analytics off in this browser. | Until you turn it back on |
We do not track your performance across sessions on our servers. Your practice history lives only in sessionStorage and goes away when you close the tab.
What we send to our server
When you generate a worksheet PDF, we receive the settings you chose, plus a title (up to 120 characters) and instructions (up to 200 characters) if you typed any. We use this only to build the PDF and send it back. We do not store it or log it. The names you give saved templates and builds stay on this device.
Please do not type a student's name or any other personal information into the title or instructions.
Analytics
We use Fathom Analytics to count visits and see which features get used. Fathom sets no cookies, reports at the country level only, and briefly sees your IP address before discarding it within 24 hours. On September 8, 2026, we removed Google Analytics and Vercel Web Analytics from every Model Teaching app. Fathom is now the only analytics tool on this site. Read more, or turn analytics off in this browser, on the Model Teaching Apps Privacy Notice.
Children's privacy
Math Facts is made for children, including children under 13. We do not collect personal information from your child: no name, no email address, no login, no photo. The only automatic data is described above and in the Model Teaching Apps Privacy Notice.
True session-only mode
Turn on Clear on close in Settings. Everything gets wiped when you close the browser tab.
Clearing your data
Use the "Clear All Templates" button on the Templates page, or the "Clear All Saved Settings" button in Settings. The Model Teaching Apps Privacy Notice also has a button that clears data for every Model Teaching app at once, including this one, because every app shares one browser origin.
About Model Teaching Apps
Math Facts is part of Model Teaching Apps, a suite of free educational tools from Model Teaching. When user accounts and cloud sync come online, we'll update this page before any change takes effect.
Last updated: October 2, 2026.